udpsrc: don't crash dereferencing NULL error when leaving multicast group on shutdown

Strangely enough, if we do pass an error variable to be filled, we
no longer get an error on leaving.

diff --git a/gst/udp/gstudpsrc.c b/gst/udp/gstudpsrc.c
index 1f42b8f..0440f47 100644 (file)
--- a/gst/udp/gstudpsrc.c
+++ b/gst/udp/gstudpsrc.c
@@ -954,7 +954,7 @@ gst_udpsrc_stop (GstBaseSrc * bsrc)
 
       if (!g_socket_leave_multicast_group (src->used_socket,
               g_inet_socket_address_get_address (src->addr), FALSE,
-              src->multi_iface, NULL)) {
+              src->multi_iface, &err)) {
         GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s",
             err->message);
         g_clear_error (&err);