tree: convert parse_tree_indirect to struct object_id

Convert parse_tree_indirect to take a pointer to struct object_id.
Update all the callers.  This transformation was achieved using the
following semantic patch and manual updates to the declaration and
definition.  Update builtin/checkout.c manually as well, since it uses a
ternary expression not handled by the semantic patch.

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

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

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

archive.c

@@ -369,7 +369,7 @@ static void parse_treeish_arg(const char **argv,
 		archive_time = time(NULL);
 	}
 
-	tree = parse_tree_indirect(oid.hash);
+	tree = parse_tree_indirect(&oid);
 	if (tree == NULL)
 		die("not a tree object");
 
@@ -383,7 +383,7 @@ static void parse_treeish_arg(const char **argv,
 		if (err || !S_ISDIR(mode))
 			die("current working directory is untracked");
 
-		tree = parse_tree_indirect(tree_oid.hash);
+		tree = parse_tree_indirect(&tree_oid);
 	}
 	ar_args->tree = tree;
 	ar_args->commit_sha1 = commit_sha1;