Reduce probe score as it misdetects our flv file from the regression test

the only reason why it doesnt break them is that flv has the same score
and happens to be first in the list.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12834 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/vc1test.c

@@ -35,7 +35,7 @@ static int vc1t_probe(AVProbeData *p)
     if (p->buf[3] != 0xC5 && AV_RL32(&p->buf[4]) != 4)
         return 0;
 
-    return AVPROBE_SCORE_MAX;
+    return AVPROBE_SCORE_MAX/2;
 }
 
 static int vc1t_read_header(AVFormatContext *s,