object: parse_object to honor its repository argument

In 8e4b0b6047 (object.c: allow parse_object to handle
arbitrary repositories, 2018-06-28), we forgot to pass the
repository down to the read_object_file.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

object.c

@@ -259,8 +259,8 @@ struct object *parse_object(struct repository *r, const struct object_id *oid)
 	if (obj && obj->parsed)
 		return obj;
 
-	if ((obj && obj->type == OBJ_BLOB && has_object_file(oid)) ||
-	    (!obj && has_object_file(oid) &&
+	if ((obj && obj->type == OBJ_BLOB && repo_has_object_file(r, oid)) ||
+	    (!obj && repo_has_object_file(r, oid) &&
 	     oid_object_info(r, oid, NULL) == OBJ_BLOB)) {
 		if (check_object_signature(repl, NULL, 0, NULL) < 0) {
 			error(_("sha1 mismatch %s"), oid_to_hex(oid));
@@ -270,7 +270,7 @@ struct object *parse_object(struct repository *r, const struct object_id *oid)
 		return lookup_object(r, oid->hash);
 	}
 
-	buffer = read_object_file(oid, &type, &size);
+	buffer = repo_read_object_file(r, oid, &type, &size);
 	if (buffer) {
 		if (check_object_signature(repl, buffer, size, type_name(type)) < 0) {
 			free(buffer);