Add name_lookup function in object_ops.

diff --git a/server/queue.c b/server/queue.c
index be80c85..8468ce6 100644
--- a/server/queue.c
+++ b/server/queue.c
@@ -150,6 +150,7 @@
     msg_queue_satisfied,       /* satisfied */
     no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
+    no_lookup_name,            /* lookup_name */
     no_close_handle,           /* close_handle */
     msg_queue_destroy          /* destroy */
 };
@@ -165,6 +166,7 @@
     NULL,                         /* satisfied */
     no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
+    no_lookup_name,               /* lookup_name */
     no_close_handle,              /* close_handle */
     thread_input_destroy          /* destroy */
 };