connected.c: add new variant that runs with --shallow-file

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/connected.h b/connected.h
index 0b060b7..071d408 100644
--- a/connected.h
+++ b/connected.h
@@ -18,6 +18,8 @@
  * Return 0 if Ok, non zero otherwise (i.e. some missing objects)
  */
 extern int check_everything_connected(sha1_iterate_fn, int quiet, void *cb_data);
+extern int check_shallow_connected(sha1_iterate_fn, int quiet, void *cb_data,
+				   const char *shallow_file);
 extern int check_everything_connected_with_transport(sha1_iterate_fn, int quiet,
 						     void *cb_data,
 						     struct transport *transport);