[SCM] libav/experimental: In mov demuxer, check that nb_streams is valid before using it in read_dac3

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 6d19fd5c26cc2971a9925376f52e57c286d2326b
Author: Baptiste Coudurier <baptiste.coudurier at gmail.com>
Date:   Tue Sep 28 00:33:21 2010 +0000

    In mov demuxer, check that nb_streams is valid before using it in read_dac3
    
    Originally committed as revision 25240 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavformat/mov.c b/libavformat/mov.c
index fdf2970..89fad78 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -567,6 +567,8 @@ static int mov_read_dac3(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
     AVStream *st;
     int ac3info, acmod, lfeon;
 
+    if (c->fc->nb_streams < 1)
+        return 0;
     st = c->fc->streams[c->fc->nb_streams-1];
 
     ac3info = get_be24(pb);

-- 
Libav/FFmpeg packaging