am 2796ba1c: am a555788d: am 0e33cb2d: am e4ccf3a1: am 3329a19b: am c87faed6: Fix integer underflow in covr MPEG4 processing

* commit '2796ba1c511517a4904d10d1fdc830c86d161342':
  Fix integer underflow in covr MPEG4 processing