-check for NULL

1 files changed, 5 insertions, 1 deletions

diff --git a/src/gns/gnunet-service-gns.c b/src/gns/gnunet-service-gns.c
index 4495bb6b7..e94614328 100644
--- a/src/gns/gnunet-service-gns.c
+++ b/src/gns/gnunet-service-gns.c
@@ -268,7 +268,11 @@ shutdown_task (void *cls,
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Shutting down!\n");
-  GNUNET_SERVER_notification_context_destroy (nc);
+  if (NULL != nc)
+  {
+    GNUNET_SERVER_notification_context_destroy (nc);
+    nc = NULL;
+  }
   while (NULL != (clh = clh_head))
   {
     GNUNET_SERVER_client_set_user_context (clh->client, NULL);