[rygel-gst-0-10-media-engine] Don't crash on pipeline errors

[Jens Georg <jensgeorg src gnome org>]

commit 49bd7741a529bfa959bbd163ca89b986efd1fb1a
Author: Jens Georg <jensg openismus com>
Date:   Wed Feb 13 14:31:18 2013 +0100

    Don't crash on pipeline errors
    
    Contrary to the documentation it's not ok to pass NULL for the GError.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693704

 src/rygel-gst-data-source.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/src/rygel-gst-data-source.c b/src/rygel-gst-data-source.c
index 921a740..06d36f6 100644
--- a/src/rygel-gst-data-source.c
+++ b/src/rygel-gst-data-source.c
@@ -265,21 +265,27 @@ on_bus_watch (GstBus     *bus G_GNUC_UNUSED,
   } else {
     gchar *err_msg = NULL;
     gchar *pipeline_name = gst_object_get_name (GST_OBJECT (self->priv->pipeline));
+    GError *error = NULL;
 
     if (message->type == GST_MESSAGE_ERROR) {
-      gst_message_parse_error (message, NULL, &err_msg);
-      g_critical (_("Error from pipeline %s: %s"),
+      gst_message_parse_error (message, &error, &err_msg);
+      g_critical (_("Error from pipeline %s: %s %s"),
                   pipeline_name,
+                  error->message,
                   err_msg);
 
       ret = FALSE;
     } else if (message->type == GST_MESSAGE_WARNING) {
-      gst_message_parse_warning (message, NULL, &err_msg);
-      g_warning (_("Warning from pipeline %s: %s"),
+      gst_message_parse_warning (message, &error, &err_msg);
+      g_warning (_("Warning from pipeline %s: %s %s"),
                  pipeline_name,
+                 error->message,
                  err_msg);
     }
 
+    if (error != NULL) {
+      g_error_free (error);
+    }
     g_free (pipeline_name);
     g_free (err_msg);
   }