[automerger] m4v_h263: add a test for invalid/negative value am: 7802c68aeb am: 08aa2367b5 am: 644ad716f0 am: c9528234a1 am: ee98fbf584 am: e82c14f41d am: 3c1c45dd71 am: 4e314d9197 am: b44663498f
am: b3b559a8bd

Change-Id: Ib17d53405edeee752691fd661a89d685aa597a10