From d8bd113ef43a89807a07261b10f1a800caa66c4e Mon Sep 17 00:00:00 2001
From: Aurelien Jacobs <aurel@gnuage.org>
Date: Sun, 4 Jan 2009 17:48:19 +0000
Subject: [PATCH] add a termination condition

Originally committed as revision 16422 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavutil/tree.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavutil/tree.c b/libavutil/tree.c
index 64653aaccb..bf485ab3f7 100644
--- a/libavutil/tree.c
+++ b/libavutil/tree.c
@@ -128,9 +128,11 @@ void *av_tree_insert(AVTreeNode **tp, void *key, int (*cmp)(void *key, const voi
 }
 
 void av_tree_destroy(AVTreeNode *t){
+    if(t){
     av_tree_destroy(t->child[0]);
     av_tree_destroy(t->child[1]);
     av_free(t);
+    }
 }
 
 #if 0