From 82a8cc6807651adecdada3c3975cb68b8f34ca11 Mon Sep 17 00:00:00 2001
From: Edward Hervey <edward.hervey@collabora.co.uk>
Date: Tue, 11 Oct 2011 18:03:01 +0200
Subject: [PATCH] asfdemux: Don't unmap a buffer that doesn't exist

---
 gst/asfdemux/gstasfdemux.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gst/asfdemux/gstasfdemux.c b/gst/asfdemux/gstasfdemux.c
index 63f41b59f0..a1d94bc6cc 100644
--- a/gst/asfdemux/gstasfdemux.c
+++ b/gst/asfdemux/gstasfdemux.c
@@ -1149,11 +1149,13 @@ wrong_type:
         ("This doesn't seem to be an ASF file"));
     return FALSE;
   }
+
 no_streams:
 read_failed:
 parse_failed:
   {
-    gst_buffer_unmap (buf, data, data_size);
+    if (buf)
+      gst_buffer_unmap (buf, data, data_size);
     gst_buffer_replace (&buf, NULL);
     GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), (NULL));
     return FALSE;