crash fix by Carl Eugen Hoyos cehoyos ag.or at

Originally committed as revision 7684 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 2 insertions, 1 deletions

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 8c08409e95..e02981e615 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -910,7 +910,8 @@ static int svq3_decode_frame (AVCodecContext *avctx,
       s->next_p_frame_damaged = 0;
   }
 
-  frame_start (h);
+  if (frame_start (h) < 0)
+    return -1;
 
   if (s->pict_type == B_TYPE) {
     h->frame_num_offset = (h->slice_num - h->prev_frame_num);