Convert lookup_tree to struct object_id

Convert the lookup_tree function to take a pointer to struct object_id.

The commit was created with manual changes to tree.c, tree.h, and
object.c, plus the following semantic patch:

@@
@@
- lookup_tree(EMPTY_TREE_SHA1_BIN)
+ lookup_tree(&empty_tree_oid)

@@
expression E1;
@@
- lookup_tree(E1.hash)
+ lookup_tree(&E1)

@@
expression E1;
@@
- lookup_tree(E1->hash)
+ lookup_tree(E1)

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/reachable.c b/reachable.c
index 8ea0bdd7c0..3bbc84417f 100644
--- a/reachable.c
+++ b/reachable.c
@@ -85,7 +85,7 @@ static void add_recent_object(const struct object_id *oid,
 		obj = parse_object_or_die(oid->hash, NULL);
 		break;
 	case OBJ_TREE:
-		obj = (struct object *)lookup_tree(oid->hash);
+		obj = (struct object *)lookup_tree(oid);
 		break;
 	case OBJ_BLOB:
 		obj = (struct object *)lookup_blob(oid);