[SCM] libav/experimental: ituh263: reject b-frame with pp_time = 0

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 9514440337875e0c63b409abcd616b68c518283f
Author: Keiji Costantini <strites at gmail.com>
Date:   Sat Mar 1 18:17:04 2014 +0000

    ituh263: reject b-frame with pp_time = 0
    
    Avoid a division by 0 in ff_mpeg4_set_one_direct_mv.
    
    Sample-Id: 00000168-google
    Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
    
    Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index e365210..98c8cfc 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -750,6 +750,8 @@ int ff_h263_decode_mb(MpegEncContext *s,
         }
 
         if(IS_DIRECT(mb_type)){
+            if (!s->pp_time)
+                return AVERROR_INVALIDDATA;
             s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
             mb_type |= ff_mpeg4_set_direct_mv(s, 0, 0);
         }else{

-- 
Libav/FFmpeg packaging