[FFmpeg-cvslog] avcodec/tiff: reset geotag_count in free_geotags()

[Michael Niedermayer]

ffmpeg | branch: release/2.1 | Michael Niedermayer <michaelni at gmx.at> | Sun Feb  2 01:47:36 2014 +0100| [ebc490e7445ccbcd1bc8ce6ded06e2fff209d40e] | committer: Michael Niedermayer

avcodec/tiff: reset geotag_count in free_geotags()

Fixes null pointer dereference
Fixes: signal_sigsegv_19d922e_3688_cov_1577641655_aletrek_tiff.mov
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit a744064c4155bde063b9e8a47699542be3b8e5eb)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ebc490e7445ccbcd1bc8ce6ded06e2fff209d40e
---

 libavcodec/tiff.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 2b100ed..80c6d6e 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -79,6 +79,7 @@ static void free_geotags(TiffContext *const s)
             av_freep(&s->geotags[i].val);
     }
     av_freep(&s->geotags);
+    s->geotag_count = 0;
 }
 
 #define RET_GEOKEY(TYPE, array, element)\