[TIMOB-25217] iOS: WebView "fireEvent" causes app crash on 6.2.0.RC

   var win = Ti.UI.createWindow({
       backgroundColor: '#fff'
   });
   
   var webview = Ti.UI.createWebView({
     url: 'test.html'
   })
   
   Ti.App.addEventListener('app:fromWebView:forum_discussions', function(e) {
     alert(e);
   });
   
   win.add(webview);
   win.open();
   

   var win = Ti.UI.createWindow({
     backgroundColor: '#fff',
     layout: 'vertical'
   });
   
   Ti.App.addEventListener('customEvent', function(e) {
     alert('Event received successfully! Assert-value 1337 = 1337:'  + (e.payload.number == 1337))
   })
   
   addButtonWithListener('1) Trigger Ti.App event', triggerTiAppEvent)
   addButtonWithListener('2) Trigger Ti.Geolocation reserve-geocoder', triggerTiGeolocationGeocoder)
   
   win.open();
   
   function addButtonWithListener(title, cb) {
     var btn = Ti.UI.createButton({
       title: title,
       top: 40
     });
   
     btn.addEventListener('click', cb);
   
     win.add(btn);
   }
   
   function triggerTiAppEvent() {
     Ti.App.fireEvent('customEvent', { payload: { number: 1337 }});
   }
   
   function triggerTiGeolocationGeocoder() {
     Ti.Geolocation.reverseGeocoder(52.279911, 8.047179, function(e) {
       alert('Reverse geocoder success! See logs for more ...');
       Ti.API.info(e.places || []);
     });
   }