From d73b65ed0ebc1bff4ee6bc873381230092792892 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 26 Jan 2013 02:05:32 +0100
Subject: [PATCH] 4xm: add assert to check that the pointer from
 read_huffman_tables is within the array

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/4xm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 39254f7c07..9ea84364b0 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -760,6 +760,8 @@ static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
     if (!prestream)
         return -1;
 
+    av_assert0(prestream <= buf + length);
+
     init_get_bits(&f->gb, buf + 4, 8 * bitstream_size);
 
     prestream_size = length + buf - prestream;