msrledec: use signed pixel_ptr in msrle_decode_pal4
authorAndreas Cadhalpun <andreas.cadhalpun@googlemail.com>
Thu, 16 Apr 2015 12:49:08 +0000 (14:49 +0200)
committerMichael Niedermayer <michaelni@gmx.at>
Wed, 22 Apr 2015 10:27:24 +0000 (12:27 +0200)
commit12e005f7e7a91a5e7cd30c486529bbbb8b2ae210
treeeb9505f7bea67d004144e3691ec4ed5521a32acb
parent38c8264d193c0093b78a9394f06b98529ac8a433
msrledec: use signed pixel_ptr in msrle_decode_pal4

This fixes segmentation faults, when pic->linesize[0] is negative.
In that case 'line * pic->linesize[0] + pixel_ptr' is treated as
unsigned and wraps around.

This reverts commit 7d78a964.
The problem was introduced in commit f7e1367f, which should obsolete
that commit.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ae6fd7300b4e9f81d3b5ba201096ffe7cccf26fb)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavcodec/msrledec.c