server: Refuse to close handles in other processes if they have an associated fd.
diff --git a/server/file.c b/server/file.c
index 0f90019..ec34295 100644
--- a/server/file.c
+++ b/server/file.c
@@ -84,7 +84,7 @@
     file_get_fd,                  /* get_fd */
     file_map_access,              /* map_access */
     no_lookup_name,               /* lookup_name */
-    no_close_handle,              /* close_handle */
+    fd_close_handle,              /* close_handle */
     file_destroy                  /* destroy */
 };