[automerger] m4v_h263: add a test for invalid/negative value am: 7802c68aeb am: 08aa2367b5 am: 644ad716f0 am: c9528234a1 am: ee98fbf584 am: e82c14f41d
am: 3c1c45dd71

Change-Id: Icf5f4e75782e692f090c25e8f682f94757e16d7e