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avcodec/vc1dec: zero SpriteData struct

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Fixes use of uninitialized data, as alternative alpha could be
calculated conditionally

Fixes part of msan_uninit-mem_7f51a8b0b3b0_1009_Arlington.wmv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-14 00:58:18 +01:00
parent cf95dee3de
commit 5f00b333a4
1 changed files with 2 additions and 0 deletions
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libavcodec/vc1dec.c
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@ -5459,6 +5459,8 @@ static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)
AVCodecContext *avctx = s->avctx;
SpriteData sd;
memset(&sd, 0, sizeof(sd));
vc1_parse_sprites(v, gb, &sd);
if (!s->current_picture.f.data[0]) {