message: Fix customPreviewLayer layout issue when rotateVideo is NO in iOS
diff: @@ -353,7 +353,8 @@ static CGFloat DegreesToRadians(CGFloat degrees) {return degrees * M_PI / 180;}
  // create a custom preview layer
  self.customPreviewLayer = [CALayer layer];
  self.customPreviewLayer.bounds = CGRectMake(0, 0, self.parentView.frame.size.width, self.parentView.frame.size.height);
  - [self layoutPreviewLayer];
  + self.customPreviewLayer.position = CGPointMake(self.parentView.frame.size.width/2., self.parentView.frame.size.height/2.);
  + [self updateOrientation];
  // create a serial dispatch queue used for the sample buffer delegate as well as when a still image is captured
  // a serial dispatch queue must be used to guarantee that video frames will be delivered in order
  