[FFmpeg-cvslog] mace: check channel count, fixes FPE

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Jun  3 14:53:43 2012 +0200| [6df1cfa7e4d488051d7b5033c0c69df970db9f82] | committer: Michael Niedermayer

mace: check channel count, fixes FPE

Fixes ticket1391

Found-by: Piotr Bandurski <ami_stuff at o2.pl>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6df1cfa7e4d488051d7b5033c0c69df970db9f82
---

 libavcodec/mace.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mace.c b/libavcodec/mace.c
index bf9ea08..dd721d2 100644
--- a/libavcodec/mace.c
+++ b/libavcodec/mace.c
@@ -231,7 +231,7 @@ static av_cold int mace_decode_init(AVCodecContext * avctx)
 {
     MACEContext *ctx = avctx->priv_data;
 
-    if (avctx->channels > 2)
+    if (avctx->channels > 2 || avctx->channels <= 0)
         return -1;
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;