Fixed potential problem with postFinishLaunch being overridden by the application.

Vittorio Giovara

I find that the calling point in SDL_uikitappdelegate.m is dangerous as the -(void) postFinishLaunch method can be overridden when subclassing.
Could this be moved in inside the init or in the didFinishLaunchingWithOptions method which are always called even when subclassed?

src/video/uikit/SDL_uikitappdelegate.m

@@ -186,8 +186,6 @@ static void SDL_IdleTimerDisabledChanged(const char *name, const char *oldValue,
 
 - (void)postFinishLaunch
 {
-    SDL_SetMainReady();
-
     /* run the user's application, passing argc and argv */
     SDL_iPhoneSetEventPump(SDL_TRUE);
     exit_status = SDL_main(forward_argc, forward_argv);
@@ -223,6 +221,7 @@ static void SDL_IdleTimerDisabledChanged(const char *name, const char *oldValue,
     SDL_SetHint(SDL_HINT_IDLE_TIMER_DISABLED, "0");
     SDL_RegisterHintChangedCb(SDL_HINT_IDLE_TIMER_DISABLED, &SDL_IdleTimerDisabledChanged);
 
+    SDL_SetMainReady();
     [self performSelector:@selector(postFinishLaunch) withObject:nil afterDelay:0.0];
 
     return YES;