attr.c: rename arg name attr_nr to avoid shadowing the global one

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

attr.c

@@ -681,13 +681,13 @@ static int fill(const char *path, int pathlen, int basename_offset,
 	return rem;
 }
 
-static int macroexpand_one(int attr_nr, int rem)
+static int macroexpand_one(int nr, int rem)
 {
 	struct attr_stack *stk;
 	struct match_attr *a = NULL;
 	int i;
 
-	if (check_all_attr[attr_nr].value != ATTR__TRUE)
+	if (check_all_attr[nr].value != ATTR__TRUE)
 		return rem;
 
 	for (stk = attr_stack; !a && stk; stk = stk->prev)
@@ -695,7 +695,7 @@ static int macroexpand_one(int attr_nr, int rem)
 			struct match_attr *ma = stk->attrs[i];
 			if (!ma->is_macro)
 				continue;
-			if (ma->u.attr->attr_nr == attr_nr)
+			if (ma->u.attr->attr_nr == nr)
 				a = ma;
 		}