AVCaptureScannerViewController orientation problem on landscape iPad

[Raphael-VG]

When using the Scan method, to show the scanner interface on an iPad (iOS7) in landscape mode, the black background with the centered activity indicator only covers 2/3 of the screen for about 1sec.

The reason for this is line 30 in AVCaptureScannerViewController.cs:
var appFrame = UIScreen.MainScreen.ApplicationFrame;

The mainscreen's frame doesn't respect device orientation, therefor height > width.
Maybe one solution could be to use the bounds of the root view controller's view.