submodule.c: correctly handle nested submodules in is_submodule_modified

diff --git a/attr.h b/attr.h
index 48ab3e1c2f1c3eaf11e32f345fc833fc160c5b02..442d464db6271da48a4ef133127c7d3a18c186cf 100644 (file)
--- a/attr.h
+++ b/attr.h
@@ -44,6 +44,7 @@ struct attr_check {
 
 extern struct attr_check *attr_check_alloc(void);
 extern struct attr_check *attr_check_initl(const char *, ...);
+extern struct attr_check *attr_check_dup(const struct attr_check *check);
 
 extern struct attr_check_item *attr_check_append(struct attr_check *check,
                                                 const struct git_attr *attr);