From 85afbb1d00d58812df5d634e946b2fcf653bcd8e Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 1 Oct 2011 14:42:53 +0200
Subject: [PATCH] AVOptions: don't segfault on NULL parameter in
 av_set_options_string()

---
 libavutil/opt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavutil/opt.c b/libavutil/opt.c
index 7c80135f5e..bf63bef2af 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -696,6 +696,9 @@ int av_set_options_string(void *ctx, const char *opts,
 {
     int ret, count = 0;
 
+    if (!opts)
+        return 0;
+
     while (*opts) {
         if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
             return ret;