Add name_lookup function in object_ops.

diff --git a/server/event.c b/server/event.c
index 90c525c..fad1542 100644
--- a/server/event.c
+++ b/server/event.c
@@ -55,6 +55,7 @@
     event_satisfied,           /* satisfied */
     event_signal,              /* signal */
     no_get_fd,                 /* get_fd */
+    no_lookup_name,            /* lookup_name */
     no_close_handle,           /* close_handle */
     no_destroy                 /* destroy */
 };