From e1e146a2d139bbc7e10b6ade68bf99abf285d6ad Mon Sep 17 00:00:00 2001
From: Luca Barbato <lu_zero@gentoo.org>
Date: Fri, 27 Apr 2012 10:53:04 -0700
Subject: [PATCH] avio: make avio_close(NULL) a no-op

Its behaviour in line with ffurl_close(NULL).
---
 libavformat/aviobuf.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 01a36475b2..0353a17379 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -756,8 +756,12 @@ int avio_open2(AVIOContext **s, const char *filename, int flags,
 
 int avio_close(AVIOContext *s)
 {
-    URLContext *h = s->opaque;
+    URLContext *h;
 
+    if (!s)
+        return 0;
+
+    h = s->opaque;
     av_free(s->buffer);
     av_free(s);
     return ffurl_close(h);