avformat/mov: simplify size code in probing a bit

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/mov.c

@@ -7131,10 +7131,7 @@ static int mov_probe(const AVProbeData *p)
         case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
         case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
         case MKTAG('f','t','y','p'):
-            if (size < 8 &&
-                (size != 1 ||
-                 offset + 12 > (unsigned int)p->buf_size ||
-                 AV_RB64(p->buf+offset + 8) == 0)) {
+            if (size < 8) {
                 score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
             } else if (tag == MKTAG('f','t','y','p') &&
                        (   AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')