Merge "m4v_h263: check header first before decoding a frame." into lmp-dev am: 6aed93d593 am: 8772f84f2c am: fc97c43c79 am: c572616245
am: 0c2592782f

Change-Id: Ib17e3a67871a039b1665742c5cb6b74e931a88ec