title: ExpandableListView holder is becoming null
body: <p>Here's my <code>getChildView</code> :</p>
  
  <pre><code>public View getChildView(int groupPosition, int childPosition,
          boolean isLastChild, View convertView, ViewGroup parent) {
      View v = convertView;
      ViewHolderChild h;
      if (v == null) {
          h = new ViewHolderChild();
          switch (groupPosition) {
          case GROUP_OVERVIEW:
              v = inflater
                      .inflate(R.layout.adapter_show_child_overview, null);
              h.wv_overview = (WebView) v
                      .findViewById(R.id.wv_adapter_show_child_overview);
              h.tv_title = (TextView) v
                      .findViewById(R.id.tv_adapter_show_overview_title);
              h.tv_date = (TextView) v
                      .findViewById(R.id.tv_adapter_show_overview_date);
              h.tv_year = (TextView) v
                      .findViewById(R.id.tv_adapter_show_overview_year);
              h.tv_network = (TextView) v
                      .findViewById(R.id.tv_adapter_show_overview_network);
              h.tv_title.setTypeface(font_bold);
              h.tv_date.setTypeface(font_thin);
              h.tv_year.setTypeface(font_thin);
              h.tv_network.setTypeface(font_bold);
              v.setTag(h);
              break;
          case GROUP_SEASONS:
              v = inflater.inflate(R.layout.adapter_shows_child_seasons, null);
              h.siv = (SmartImageView) v.findViewById(R.id.siv_adapter_show_child_seasons);
              h.tv_seasons = (TextView) v.findViewById(R.id.tv_adapter_show_child_seasons);
              v.setTag(h);
              break;
          }
  
  
      } else {
          h = (ViewHolderChild) v.getTag();
      }
      switch (groupPosition) {
      case GROUP_OVERVIEW:
          OverView overview = groups.get(groupPosition).getOverview();
          FunctionUtils.loadHtml(h.wv_overview, overview.getOverview(),
                  FunctionUtils.FONT_ROBOTO_THIN, 14);
          h.tv_date.setText("" + overview.getAirDay() + "/"
                  + overview.getAirTime());
          h.tv_title.setText(overview.getTitle());
          h.tv_year.setText("" + overview.getYear());
          h.tv_network.setText("" + overview.getNetwork());
          break;
      case GROUP_SEASONS:
          SeasonObject season = groups.get(groupPosition).getSeasons().get(childPosition);
          if(season.getImages().getPoster() != null){
              h.siv.setImageUrl(season.getImages().getPoster());
          }
          h.tv_seasons.setText("Season : "+season.getSeason()+" Episode : "+season.getEpisodes());
          break;
      }
      return v;
  }
  </code></pre>
  
  <p>But when i start to scroll down, there is a problem on this line : <code>h.siv.setImageUrl(season.getImages().getPoster());</code></p>
  
  <p>I saw the log and it says h contains all the views from <code>GROUP_OVERVIEW</code> and not <code>GROUP_SEASONS</code></p>
  
  <p>It causes a <code>NullPointerException, ExpandableListConnector getView</code></p>
  
  <p>Here's the logcat :</p>
  
  <pre><code>02-13 22:42:11.952: E/AndroidRuntime(7832): FATAL EXCEPTION: main
  02-13 22:42:11.952: E/AndroidRuntime(7832): java.lang.NullPointerException
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at com.galite.pomo.adapters.ShowAdapter.getChildView(ShowAdapter.java:117)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:451)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.AbsListView.obtainView(AbsListView.java:2161)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.ListView.makeAndAddView(ListView.java:1840)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.ListView.fillDown(ListView.java:675)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.ListView.fillGap(ListView.java:639)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4970)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3126)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.widget.AbsListView.onTouchEvent(AbsListView.java:3400)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.View.dispatchTouchEvent(View.java:7384)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2203)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1938)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1952)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1966)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1418)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.app.Activity.dispatchTouchEvent(Activity.java:2424)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.View.dispatchPointerEvent(View.java:7564)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:174)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:5472)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:5512)
  02-13 22:42:11.952: E/AndroidRuntime(7832):     at android.view.Ch
  </code></pre>