[FFmpeg-cvslog] lavfi: do not segfault on NULL passed to avfilter_get_by_name()

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sun Apr  7 07:33:24 2013 +0200| [f160c6a18a574b4c7d063e0a748037cbbd9912ee] | committer: Anton Khirnov

lavfi: do not segfault on NULL passed to avfilter_get_by_name()

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f160c6a18a574b4c7d063e0a748037cbbd9912ee
---

 libavfilter/avfilter.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 199d8f9..8f028e1 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -273,6 +273,9 @@ AVFilter *avfilter_get_by_name(const char *name)
 {
     AVFilter *f = NULL;
 
+    if (!name)
+        return NULL;
+
     while ((f = avfilter_next(f)))
         if (!strcmp(f->name, name))
             return f;