Merge commit '701e8b42'

* commit '701e8b42':
  vc-1: Optimise parser (with special attention to ARM)

Conflicts:
	libavcodec/vc1_parser.c

See: a0d7f9ecMerged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/vc1_parser.c

@@ -228,8 +228,6 @@ static int vc1_parse(AVCodecParserContext *s,
         }
     }
 
-    vpc->v.first_pic_header_flag = 1;
-
     /* If we return with a valid pointer to a combined frame buffer
      * then on the next call then we'll have been unhelpfully rewound
      * by up to 4 bytes (depending upon whether the start code