From 424a865c5d1c020ed74873b06d715db8caa287cb Mon Sep 17 00:00:00 2001
From: Monty <xiphmont@xiph.org>
Date: Tue, 24 Jul 2007 01:08:23 +0000
Subject: [PATCH] Catch one bulletproofing oversight; only an app bug would
 trip it

svn path=/trunk/vorbis/; revision=13294
---
 lib/vorbisfile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vorbisfile.c b/lib/vorbisfile.c
index 6d6ec16..d878b4c 100644
--- a/lib/vorbisfile.c
+++ b/lib/vorbisfile.c
@@ -553,7 +553,7 @@ static int _open_seekable2(OggVorbis_File *vf){
   /* we're partially open and have a first link header state in
      storage in vf */
   /* we can seek, so set out learning all about this file */
-  if(vf->callbacks.seek_func){
+  if(vf->callbacks.seek_func && vf->callbacks.tell_func){
     (vf->callbacks.seek_func)(vf->datasource,0,SEEK_END);
     vf->offset=vf->end=(vf->callbacks.tell_func)(vf->datasource);
   }else{
-- 
2.7.4