[TIMOB-8880] iOS: setBadge() does nothing on Tab if icon is not set

var tabgroup = Ti.UI.createTabGroup({
	backgroundColor: '#fff'	
});
var windows = [];
var tabs = [];

var addWindowListener = function(win, tab) {
	win.addEventListener('click', function(e) {
		if (tab.badge) {
			tab.setBadge(null);	
		} else {
			tab.setBadge('23');
		}
	});
};

for (var i = 0; i < 4; i++) {
	windows.push(Ti.UI.createWindow({
		title: 'Window ' + (i+1),
		backgroundColor: '#a00'	
	}));
	tabs.push(Ti.UI.createTab({
		window: windows[i],
		title: 'Window ' + (i+1),
		
		// removing the 'icon' property below will make the 
		// badge fail to appear when you click the window
		icon: 'KS_nav_ui.png'
	}));
	tabgroup.addTab(tabs[i]);
	addWindowListener(windows[i], tabs[i]);
}

tabgroup.open();