From d8117471f6c4249997aa3fbd9affe73c1d30637a Mon Sep 17 00:00:00 2001
From: Julien Moutte <julien@fluendo.com>
Date: Thu, 4 Feb 2010 19:45:42 +0100
Subject: [PATCH] mpegtsmux: Fix a potential unref of a NULL pointer.

At first iteration we don't have any cached SPS/PPS buffer to free.
---
 gst/mpegtsmux/mpegtsmux_h264.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gst/mpegtsmux/mpegtsmux_h264.c b/gst/mpegtsmux/mpegtsmux_h264.c
index a3c4085d94..7188ce7c09 100644
--- a/gst/mpegtsmux/mpegtsmux_h264.c
+++ b/gst/mpegtsmux/mpegtsmux_h264.c
@@ -130,8 +130,10 @@ mpegtsmux_process_codec_data_h264 (MpegTsPadData * data, MpegTsMux * mux)
 
   /* Detect a codec data change */
   if (h264_data->last_codec_data != data->codec_data) {
-    gst_buffer_unref (h264_data->cached_es);
-    h264_data->cached_es = NULL;
+    if (h264_data->cached_es) {
+      gst_buffer_unref (h264_data->cached_es);
+      h264_data->cached_es = NULL;
+    }
     ret = TRUE;
   }