[SCM] libav/experimental: Fix crash in uninit.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 2467997c8c540a50950d7d2078d8bb9d7cb56d24
Author: Stefano Sabatini <stefano.sabatini-lala at poste.it>
Date:   Thu Nov 25 23:51:37 2010 +0000

    Fix crash in uninit.
    
    Originally committed as revision 25829 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavfilter/vf_frei0r.c b/libavfilter/vf_frei0r.c
index 49fe172..48f5b49 100644
--- a/libavfilter/vf_frei0r.c
+++ b/libavfilter/vf_frei0r.c
@@ -275,7 +275,7 @@ static av_cold void uninit(AVFilterContext *ctx)
 {
     Frei0rContext *frei0r = ctx->priv;
 
-    if (frei0r->destruct)
+    if (frei0r->destruct && frei0r->instance)
         frei0r->destruct(frei0r->instance);
     if (frei0r->deinit)
         frei0r->deinit();

-- 
Libav/FFmpeg packaging