tag: allow lookup_tag to handle arbitrary repositories

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/tag.h b/tag.h
index 45b0b08..6a160c9 100644
--- a/tag.h
+++ b/tag.h
@@ -11,8 +11,7 @@ struct tag {
 	char *tag;
 	timestamp_t date;
 };
-#define lookup_tag(r, o) lookup_tag_##r(o)
-extern struct tag *lookup_tag_the_repository(const struct object_id *oid);
+extern struct tag *lookup_tag(struct repository *r, const struct object_id *oid);
 #define parse_tag_buffer(r, i, d, s) parse_tag_buffer_##r(i, d, s)
 extern int parse_tag_buffer_the_repository(struct tag *item, const void *data, unsigned long size);
 extern int parse_tag(struct tag *item);