[FFmpeg-cvslog] lavfi/deshake: fix crash in uninit()

[Stefano Sabatini]

ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Thu Jun 21 17:00:52 2012 +0200| [1bb30d02959e530c72a0026047cb916883c031a7] | committer: Stefano Sabatini

lavfi/deshake: fix crash in uninit()

Add NULL check on avctx before calling avcodec_close() on it.

Fix trac ticket #1472.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1bb30d02959e530c72a0026047cb916883c031a7
---

 libavfilter/vf_deshake.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_deshake.c b/libavfilter/vf_deshake.c
index 6b2a3d4..ff78f1f 100644
--- a/libavfilter/vf_deshake.c
+++ b/libavfilter/vf_deshake.c
@@ -420,7 +420,8 @@ static av_cold void uninit(AVFilterContext *ctx)
     avfilter_unref_buffer(deshake->ref);
     if (deshake->fp)
         fclose(deshake->fp);
-    avcodec_close(deshake->avctx);
+    if (deshake->avctx)
+        avcodec_close(deshake->avctx);
     av_freep(&deshake->avctx);
 }