Add name_lookup function in object_ops.

diff --git a/server/debugger.c b/server/debugger.c
index 8940c0b..893225e 100644
--- a/server/debugger.c
+++ b/server/debugger.c
@@ -73,6 +73,7 @@
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
     no_get_fd,                     /* get_fd */
+    no_lookup_name,                /* lookup_name */
     no_close_handle,               /* close_handle */
     debug_event_destroy            /* destroy */
 };
@@ -91,6 +92,7 @@
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
     no_get_fd,                     /* get_fd */
+    no_lookup_name,                /* lookup_name */
     no_close_handle,               /* close_handle */
     debug_ctx_destroy              /* destroy */
 };