From 7ee5e97c46e30fb3d6f9f78cc3313dbc06528b37 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 7 May 2013 16:07:27 +0200
Subject: [PATCH] gifdec: reset previous Graphic Control Extension disposal
 type

This fixes out of array accesses.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d23b8462b5a4a9da78ed45c4a7a3b35d538df909)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/gifdec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/gifdec.c b/libavcodec/gifdec.c
index 8fb1f4bbbd..727887ab44 100644
--- a/libavcodec/gifdec.c
+++ b/libavcodec/gifdec.c
@@ -462,6 +462,7 @@ static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, A
 
     if (s->keyframe) {
         s->keyframe_ok = 0;
+        s->gce_prev_disposal = GCE_DISPOSAL_NONE;
         if ((ret = gif_read_header1(s)) < 0)
             return ret;