From a636a56bf44d0b223214bc6d60d0560ddc469d26 Mon Sep 17 00:00:00 2001
From: Aurelien Jacobs <aurel@gnuage.org>
Date: Tue, 5 Aug 2008 00:40:46 +0000
Subject: [PATCH] matroskadec: invert a test

Originally committed as revision 14567 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/matroskadec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 6b1ff97d50..abd8cc2237 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1638,7 +1638,10 @@ matroska_read_header (AVFormatContext    *s,
     matroska_execute_seekhead(matroska);
 
     /* Have we found a cluster? */
-    if (ebml_peek_id(matroska, NULL) == MATROSKA_ID_CLUSTER) {
+    if (ebml_peek_id(matroska, NULL) != MATROSKA_ID_CLUSTER)
+        return -1;
+
+    {
         MatroskaTrack *tracks = matroska->tracks.elem;
         int i, j;
         AVStream *st;