fix problem where sometimes VLCOpenGLES2VideoView has a different size than the superview.

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

modules/video_output/ios2.m

@@ -148,6 +148,7 @@ static int Open(vlc_object_t *this)
 
     /* setup the actual OpenGL ES view */
     sys->glESView = [[VLCOpenGLES2VideoView alloc] initWithFrame:[viewContainer bounds]];
+    sys->glESView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
 
     if (!sys->glESView)
         goto bailout;