From a7c1689dedd11689edb30088d467ac03f9b8d1cf Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 24 Aug 2013 21:30:46 +0200
Subject: [PATCH] 4xm: check that bits per sample is strictly positive

Avoids a divide by zero.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
---
 libavformat/4xm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index 614b1d5f2a..f003c9c25a 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -146,7 +146,7 @@ static int parse_strk(AVFormatContext *s,
 
     if (fourxm->tracks[track].channels    <= 0 ||
         fourxm->tracks[track].sample_rate <= 0 ||
-        fourxm->tracks[track].bits        < 0) {
+        fourxm->tracks[track].bits        <= 0) {
         av_log(s, AV_LOG_ERROR, "audio header invalid\n");
         return AVERROR_INVALIDDATA;
     }