[SDL] iOS fix bug with audio interrupted by a phone call not restoring.

src/audio/coreaudio/SDL_coreaudio.m

@@ -376,15 +376,16 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
             /* An interruption end notification is not guaranteed to be sent if
              we were previously interrupted... resuming if needed when the app
              becomes active seems to be the way to go. */
+			// Note: object: below needs to be nil, as otherwise it filters by the object, and session doesn't send foreground / active notifications.  johna
             [center addObserver:listener
                        selector:@selector(applicationBecameActive:)
                            name:UIApplicationDidBecomeActiveNotification
-                         object:session];
+                         object:nil];
 
             [center addObserver:listener
                        selector:@selector(applicationBecameActive:)
                            name:UIApplicationWillEnterForegroundNotification
-                         object:session];
+                         object:nil];
 
             this->hidden->interruption_listener = CFBridgingRetain(listener);
         } else {