Fix use of CADisplayLink on iOS

lime/_backend/native/NativeApplication.hx

@@ -134,7 +134,10 @@ class NativeApplication {
 		#elseif lime_cffi
 		
 		var result = lime_application_exec (handle);
+		
+		#if (!emscripten && !ios && !nodejs)
 		parent.onExit.dispatch (result);
+		#end
 		
 		return result;
 		

project/src/backend/sdl/SDLApplication.cpp

@@ -87,7 +87,7 @@ namespace lime {
 		
 		Init ();
 		
-		#ifdef EMSCRIPTEN
+		#if defined(IPHONE) || defined(EMSCRIPTEN)
 		
 		return 0;
 		

templates/haxe/ApplicationMain.hx

@@ -114,7 +114,7 @@ class ApplicationMain {
 		
 		var result = app.exec ();
 		
-		#if (sys && !nodejs && !emscripten)
+		#if (sys && !ios && !nodejs && !emscripten)
 		lime.system.System.exit (result);
 		#end