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smacker: fix off by one error 

Regression since a93b572ae4.

Fixes #2426.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
(cherry picked from commit e3cc92a623)
This commit is contained in:
Paul B Mahol 2013-04-03 12:57:58 +00:00 committed by Carl Eugen Hoyos
parent 8b72bcba71
commit 1aa50348d8
1 changed files with 1 additions and 1 deletions
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2
libavformat/smacker.c
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@ -269,7 +269,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
} else if(t & 0x40){ /* copy with offset */
off = avio_r8(s->pb);
j = (t & 0x3F) + 1;
if (off + j > 0xff) {
if (off + j - 1 > 0xff) {
av_log(s, AV_LOG_ERROR,
"Invalid palette update, offset=%d length=%d extends beyond palette size\n",
off, j);