Description: Fix issue with seg fault in pulsesink
 Pulsesink could sometimes seg fault before, so some code is tighted up a 
 bit. See https://bugzilla.gnome.org/show_bug.cgi?id=683782 for a more
 detailed explanation.

--- gst-plugins-good0.10-0.10.31.orig/ext/pulse/pulsesink.c
+++ gst-plugins-good0.10-0.10.31/ext/pulse/pulsesink.c
@@ -2053,8 +2053,7 @@ static gboolean
 gst_pulsesink_pad_acceptcaps (GstPad * pad, GstCaps * caps)
 {
   GstPulseSink *psink = GST_PULSESINK (gst_pad_get_parent_element (pad));
-  GstPulseRingBuffer *pbuf = GST_PULSERING_BUFFER_CAST (GST_BASE_AUDIO_SINK
-      (psink)->ringbuffer);
+  GstPulseRingBuffer *pbuf = NULL;
   GstCaps *pad_caps;
   GstStructure *st;
   gboolean ret = FALSE;
@@ -2073,10 +2072,20 @@ gst_pulsesink_pad_acceptcaps (GstPad * p
     gst_caps_unref (pad_caps);
   }
 
-  /* Either template caps didn't match, or we're still in NULL state */
-  if (!ret || !pbuf->context)
+  /* Template caps didn't match */
+  if (!ret)
     goto done;
 
+  GST_OBJECT_LOCK (psink);
+  pbuf = GST_PULSERING_BUFFER_CAST (GST_BASE_AUDIO_SINK (psink)->ringbuffer);
+  if (pbuf != NULL)
+    gst_object_ref (pbuf);
+  GST_OBJECT_UNLOCK (psink);
+
+  /* We're still in NULL state */
+  if (pbuf == NULL || pbuf->context == NULL)
+     goto done;
+
   /* If we've not got fixed caps, creating a stream might fail, so let's just
    * return from here with default acceptcaps behaviour */
   if (!gst_caps_is_fixed (caps))
@@ -2171,6 +2180,8 @@ out:
 
 done:
   gst_object_unref (psink);
+  if (pbuf != NULL)
+    gst_object_unref (pbuf);
   return ret;
 
 info_failed: