title: update text inside list view on itemclick titanium appcelerator
body: <p>Titanium Appcelerator
  unable to update text inside listview code on button click below:</p>
  
  <pre><code>{
              type : 'Ti.UI.View',
              bindId : 'vwqtySelection',
              properties : {
                  top : '30dp',
                  height : '50dp',
                  //backgroundColor: 'red',
                  width : require('main').XhdpiSupport(150),
                  right : '90dp',
                  zIndex : 10
  
              },
              childTemplates : [{
                  type : 'Ti.UI.Button',
                  bindId : 'btnMinus',
                  properties : {
                      left : '15dp',
                      color : '#676972',
                      title : '-',
                      width : require('main').XhdpiSupport(30),
                      height : require('main').XhdpiSupport(22),
                  }
  
              }, {
                  type : 'Ti.UI.Label',
                  bindId : 'qtyValue',
                  properties : {
                      //touchenabled : false,
                      left : '50dp',
                      color : '#676972',
                      text : '4',
                      textAlign : 'center',
                  }
  
              }, {
                  type : 'Ti.UI.Button',
                  bindId : 'btnPlus',
                  properties : {
                      left : '79dp',
                      color : '#676972',
                      title : '+',
                  }
              }]  
          }
  </code></pre>
  
  <p><strong>>  Itemclick selection where to update text on button click</strong>
  wants to update text on button click i.e. 4 to 2</p>
  
  <p>below code i tried </p>
  
  <pre><code>    scrlView.addEventListener('itemclick', function(e) {
  
           if (e.bindId === 'btnMinus') {
               item = section.getItemAt(e.itemIndex);
                  e.section.qtyValue.properties.text = "2";
                  e.section.updateItemAt(e.itemIndex, item); 
                 //here not able to  update text 4 to 2 
          } else if (e.bindId === 'btnPlus') {
  
          }
  }};
  </code></pre>
  
  <p>error getting below
  Message: Uncaught TypeError: Cannot read property 'properties' of undefined</p>