checkout, read-tree: fix leak of unpack_trees_options.dir

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/checkout.c

@@ -760,6 +760,10 @@ static int merge_working_tree(const struct checkout_opts *opts,
 		init_tree_desc(&trees[1], tree->buffer, tree->size);
 
 		ret = unpack_trees(2, trees, &topts);
+		if (topts.dir) {
+			dir_clear(topts.dir);
+			FREE_AND_NULL(topts.dir);
+		}
 		clear_unpack_trees_porcelain(&topts);
 		if (ret == -1) {
 			/*

builtin/read-tree.c

@@ -250,6 +250,11 @@ int cmd_read_tree(int argc, const char **argv, const char *cmd_prefix)
 	if (unpack_trees(nr_trees, t, &opts))
 		return 128;
 
+	if (opts.dir) {
+		dir_clear(opts.dir);
+		FREE_AND_NULL(opts.dir);
+	}
+
 	if (opts.debug_unpack || opts.dry_run)
 		return 0; /* do not write the index out */