vc1_split should be static

Originally committed as revision 8626 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/vc1.c

@@ -4601,7 +4601,7 @@ static int vc1_parse(AVCodecParserContext *s,
     return next;
 }
 
-int vc1_split(AVCodecContext *avctx,
+static int vc1_split(AVCodecContext *avctx,
                            const uint8_t *buf, int buf_size)
 {
     int i;