Add name_lookup function in object_ops.

diff --git a/server/request.c b/server/request.c
index 71ee445..f7fb0b3 100644
--- a/server/request.c
+++ b/server/request.c
@@ -95,6 +95,7 @@
     NULL,                          /* satisfied */
     no_signal,                     /* signal */
     no_get_fd,                     /* get_fd */
+    no_lookup_name,                /* lookup_name */
     no_close_handle,               /* close_handle */
     master_socket_destroy          /* destroy */
 };