[TIMOB-4210] iOS - removeEventListener crashes app only on device.

var win1 = Ti.UI.createWindow({
	orientationModes:[1,2,3,4]
});
var addCount = 0;
var btnAdd = Ti.UI.createButton({ 
	title: "addEvent",
	width: 200,
	height: 50,
	top: 20
});
var btnRemove = Ti.UI.createButton({ 
	title: "removeEvent",
	width: 200,
	height: 50,
	top: 200
});
var orientationCallback = function(e){
	Ti.API.info("*** orientationCallback called ***");
};

btnAdd.addEventListener('click', function(){
	Ti.API.info("*** ADDING ORIENTATIONCHANGE EVENT");
	Ti.Gesture.addEventListener('orientationchange', orientationCallback);
	if(addCount > 0){
		Ti.API.info("*** ROTATE NOW");
	}
	addCount++;
});

btnRemove.addEventListener('click', function(){
	Ti.API.info("*** REMOVING ORIENTATIONCHANGE EVENT");
	Ti.Gesture.removeEventListener('orientationchange', orientationCallback);
});

win1.add(btnAdd);
win1.add(btnRemove);
win1.open();

[INFO] *** ADDING ORIENTATIONCHANGE EVENT
[INFO] *** orientationCallback called ***
[INFO] *** orientationCallback called ***
[INFO] *** REMOVING ORIENTATIONCHANGE EVENT
[INFO] *** ADDING ORIENTATIONCHANGE EVENT
[INFO] *** ROTATE NOW
[Switching to process 13315 thread 0x0]
[Switching to process 13315 thread 0x0]
Current language:  auto; currently c++
warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found).
(gdb) bt
#0  TiObjectCallAsFunction (ctx=0x4b4cee4, object=0xa, thisObject=0x1, argumentCount=1, arguments=0x4ab6b70, exception=0x4ab6b6c) at /Users/stiv/src/appcelerator/tijscore/TiCore/API/TiObjectRef.cpp:413
#1  0x00036de2 in -[KrollObject triggerEvent:withObject:thisObject:] (self=0x4cefc0, _cmd=0x186560, eventName=0x1bd6dc, eventData=0x4cf5f0, thisObject=0x4cefc0) at /Users/Pedro/Desktop/test/build/iphone/Classes/KrollObject.m:1513
#2  0x0002b29e in -[KrollEvent invoke:] (self=0x4cf650, _cmd=0x185a22, context=0x4abfc0) at /Users/Pedro/Desktop/test/build/iphone/Classes/KrollContext.mm:597
#3  0x0002a9cc in -[KrollContext invoke:] (self=0x4abfc0, _cmd=0x185a22, object=0x4cf650) at /Users/Pedro/Desktop/test/build/iphone/Classes/KrollContext.mm:828
#4  0x0002ccb4 in -[KrollContext main] (self=0x4abfc0, _cmd=0x317445d5) at /Users/Pedro/Desktop/test/build/iphone/Classes/KrollContext.mm:1138
#5  0x34bc9388 in -[NSThread main] ()
#6  0x34c3b5cc in __NSThread__main__ ()
#7  0x3605f310 in _pthread_start ()
#8  0x36060bbc in thread_start ()