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

Change-Id: Iaddbc9ad1cc54addec6f1e20f7ed9bf1dd11552b