title: admob click after return it wrong layout
body: <p>I use cocos2d combined with AdMob , nomarl my app work great, but after hit the advertising and return the game, it wrong layout, my game is landscape! </p>
  
  <p>Things changes after AdMob is involved. AdMob has a AD type "movie". After clicking the ad, it popups a full screen mode, and play a movie, and then back to the game. The game changes, originally, it is landscape mode, and after back from ad, it seems to be portrait mode, and the game is scaled, everything looks bad. I have tried to update the view controller / <code>CCDirector</code> after back from ad, but it doesn't work.</p>
  
  <p>A workaround found: just rotate the device to the counterpart landscape mode and everything goes well again.</p>
  
  <p>Just wonder if there is any way to prevent telling customers rotate it manually?
  Have you encountered this before?</p>
  
  <pre><code>_viewController = [[UIViewController alloc] init];
  _viewController.view = [[CCDirector sharedDirector] openGLView];
  
  _admobView = [[GADBannerView alloc] initWithAdSize:kGADAdSizeBanner];
  _admobView.adUnitID = ADMOB_PUBLISHER_ID;
  _admobView.delegate = self;
  
  GADRequest *request = [GADRequest request];
  request.testing = YES;
  
  [_admobView setRootViewController:_viewController];
  [_admobView loadRequest:request];
  
  [_viewController.view addSubview:_admobView];
  </code></pre>