tree-diff: convert diff_root_tree_sha1 to struct object_id

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/diff.h b/diff.h
index 6aeeda035e..8d46a67099 100644
--- a/diff.h
+++ b/diff.h
@@ -215,8 +215,8 @@ extern struct combine_diff_path *diff_tree_paths(
 	struct strbuf *base, struct diff_options *opt);
 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 			  const char *base, struct diff_options *opt);
-extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
-                               struct diff_options *opt);
+extern int diff_root_tree_oid(const struct object_id *new_oid, const char *base,
+			      struct diff_options *opt);
 
 struct combine_diff_path {
 	struct combine_diff_path *next;