snowdec: fix off by 1 error in dimensions check

fixes infinite loop

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c
index e2115068c8..1bfd0969c8 100644
--- a/libavcodec/snowdec.c
+++ b/libavcodec/snowdec.c
@@ -345,7 +345,7 @@ static int decode_header(SnowContext *s){
         return -1;
     }
     if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
-             s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 0){
+             s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){
         av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);
         return -1;
     }