[TIMOB-4158] Debugger: Variable pane is returning 'undefined' instead of null

var win = Ti.UI.createWindow({
	backgroundColor: 'white',
	layout: 'vertical'
});

var f = function() {
	var foo = "a";
	Ti.API.info("Inside anonymous function: "+foo);
	Ti.API.info("Global val: "+x);
	x+=1;
};

var b1 = Ti.UI.createButton({
	title:'Anonymous f/g',
	top:20
});

b1.addEventListener('click', function(e) {
	f();
	var g = f;
	g();
});

win.add(b1);
win.open();