In svq3 decoder, check negative mb_type, fix potential crash.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
14 years ago · 0fa8d19987
parent 6c2845600d
commit 0fa8d19987
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@ -1049,7 +1049,7 @@ static int svq3_decode_frame(AVCodecContext *avctx,
            } else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4) {
                mb_type += 4;
            }
-            if (mb_type > 33 || svq3_decode_mb(svq3, mb_type)) {
+            if ((unsigned)mb_type > 33 || svq3_decode_mb(svq3, mb_type)) {
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
                return -1;
            }