Add name_lookup function in object_ops.

diff --git a/server/named_pipe.c b/server/named_pipe.c
index 3664f2b..626c0e1 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -110,6 +110,7 @@
     NULL,                         /* satisfied */
     no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
+    no_lookup_name,               /* lookup_name */
     no_close_handle,              /* close_handle */
     named_pipe_destroy            /* destroy */
 };
@@ -131,6 +132,7 @@
     no_satisfied,                 /* satisfied */
     no_signal,                    /* signal */
     pipe_server_get_fd,           /* get_fd */
+    no_lookup_name,               /* lookup_name */
     no_close_handle,              /* close_handle */
     pipe_server_destroy           /* destroy */
 };
@@ -162,6 +164,7 @@
     no_satisfied,                 /* satisfied */
     no_signal,                    /* signal */
     pipe_client_get_fd,           /* get_fd */
+    no_lookup_name,               /* lookup_name */
     no_close_handle,              /* close_handle */
     pipe_client_destroy           /* destroy */
 };