[AC-4574] Removing webviews from parent views crashes app

index.js

var button1 = Ti.UI.createButton({
	height: 50,
	width: 100,
	backgroundColor: '#00FF00',
	color: '#FFF',
	top: 50, 
	title: 'Get View'
});

var firstView = Ti.UI.createView({
	backgroundColor: '#CFCFCF'
});

var button2 = Ti.UI.createButton({
	backgroundColor: '#000',
	color: '#FFF',
	height: 50,
	width: 100,
	title: 'Get WebView'
});

var secondView = Ti.UI.createView();

var button3 = Ti.UI.createButton({
	backgroundColor: '#0000FF',
	color: '#FFF',
	height: 50,
	width: 100,
	top: 60,
	title: 'Go Back'
});

button3.addEventListener( 'click', function( e ) {
	var items = firstView.children;
	
	for( var i = 0; i<=items.length; i++ ){
		firstView.remove( items[ i ] );
		items[ i ] = null;
	}
});

var webView = Ti.UI.createWebView({
	height : Titanium.UI.SIZE,
	width : '100%',
	top: 20,
	contentHeight : Ti.UI.SIZE,
	bottom : 0,
	font : Alloy.CFG.FONT_14,
	color : '#666',
	ignoreSslError : true,
	html: '<b>This is only a test. Do not be alarmed.</b>'
});

secondView.add(webView);
secondView.add(button3);

button2.addEventListener( 'click', function( e ) {
	firstView.add(secondView);
});

firstView.add( button2 );

button1.addEventListener( 'click', function( e ) {
	$.testView.add( firstView );
});

$.testView.add( button1 );

$.index.open();