[TIMOB-4449] Mapview Region ignored when mapview placed in tabgroup

var tabGroup = Titanium.UI.createTabGroup();

var win2 = Titanium.UI.createWindow({  
    title:'Map',
    navBarHidden:true
});

var tab2 = Titanium.UI.createTab({  
    icon:'KS_nav_ui.png',
    title:'Map',
    window:win2
});


var mapview = Titanium.Map.createView({
	mapType: Titanium.Map.STANDARD_TYPE,
    regionFit:true,
    region:{latitude:40.581691,longitude:-122.3916,latitudeDelta:2, longitudeDelta:2}
});
win2.add(mapview);

tabGroup.addTab(tab2);     

tabGroup.open();