title: android graph view not shown when the data is the same
body: <p>I'm using android graph view from <a href="http://www.android-graphview.org/" rel="nofollow">here</a> it works fine , but when the Y value of data are the same it doesn't show any thing more like the whole View visibility is GONE.
  I can handle this by appending a  fake value to the data point but it doesn't look fine.does anybody have an idea. Thanks a lot!
  this part of my code</p>
  
  <pre><code>/...
  DataPoint[] dataPoints = new DataPoint[length];
  // populate my dataPoints
  LineGraphSeries&lt;DataPoint&gt; series = new LineGraphSeries&lt;DataPoint&gt;(
                              dataPoints);
  graph.removeAllSeries();
  graph.addSeries(series);
  // make other stuff
  /...
  </code></pre>