[SCM] libav/experimental: maybe fix segfault with missing extradata (unchecked)

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 2c160320280a80362507eb4ce5fe20dd399be93e
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Wed Jan 24 00:54:36 2007 +0000

    maybe fix segfault with missing extradata (unchecked)
    
    Originally committed as revision 7677 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index c852832..8c08409 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -826,7 +826,7 @@ static int svq3_decode_frame (AVCodecContext *avctx,
     }
 
     /* if a match was found, parse the extra data */
-    if (!memcmp (extradata, "SEQH", 4)) {
+    if (extradata && !memcmp (extradata, "SEQH", 4)) {
 
       GetBitContext gb;
 

-- 
Libav/FFmpeg packaging