[TIMOB-13213] Android: Adding label to TabGroup addTab method, No Exception is thrown

When a label is passed to a tab group's addTab method, Exception is expected but no exception is displayed. This is not a regression.It exists on 3.0.2 GA as well. Steps to reproduce: 1) Add the following to app.js and run the app. var tabs = Ti.UI.createTabGroup(); tabs.addTab(Ti.UI.createLabel()); tabs.open(); Expected: A classCastException should occur. E/TiApplication(8640): (main) [5973,6039] Sending event: exception on thread: main msg:java.lang.ClassCastException: ti.modules.titanium.ui.LabelProxy; Titanium 1.8.1,2012/01/27 17:31,a24502a E/TiApplication(8640): java.lang.ClassCastException: ti.modules.titanium.ui.LabelProxy Actual: No exception is occurred.