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-rw-r--r--libavcodec/vc1dec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index d538c74c3e..d2923b9cf2 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -1049,8 +1049,8 @@ static void vc1_mc_4mv_chroma4(VC1Context *v)
mquant = v->altpq; \
if ((edges&8) && s->mb_y == (s->mb_height - 1)) \
mquant = v->altpq; \
- if (!mquant) { \
- av_log(v->s.avctx,AV_LOG_ERROR, "zero mquant\n"); \
+ if (!mquant || mquant > 31) { \
+ av_log(v->s.avctx, AV_LOG_ERROR, "invalid mquant %d\n", mquant); \
mquant = 1; \
} \
}