From 5cd460ba63fa78aa8c61e7e5c43da194b0505717 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 17 Apr 2012 03:19:57 +0200
Subject: [PATCH] vsrc_buffer: fix null ptr segfault

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavfilter/vsrc_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vsrc_buffer.c b/libavfilter/vsrc_buffer.c
index d003add88b..ba00b2b651 100644
--- a/libavfilter/vsrc_buffer.c
+++ b/libavfilter/vsrc_buffer.c
@@ -209,7 +209,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
 static av_cold void uninit(AVFilterContext *ctx)
 {
     BufferSourceContext *s = ctx->priv;
-    while (av_fifo_size(s->fifo)) {
+    while (s->fifo && av_fifo_size(s->fifo)) {
         AVFilterBufferRef *buf;
         av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
         avfilter_unref_buffer(buf);