Add name_lookup function in object_ops.

diff --git a/server/timer.c b/server/timer.c
index 5afc2ef..717d6d5 100644
--- a/server/timer.c
+++ b/server/timer.c
@@ -63,6 +63,7 @@
     timer_satisfied,           /* satisfied */
     no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
+    no_lookup_name,            /* lookup_name */
     no_close_handle,           /* close_handle */
     timer_destroy              /* destroy */
 };