worktree: convert struct worktree to object_id

Convert the head_sha1 member to be head_oid instead.  This is required
to convert resolve_ref_unsafe.

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/worktree.c b/worktree.c
index 7001562..cb35db0 100644
--- a/worktree.c
+++ b/worktree.c
@@ -31,7 +31,7 @@ static void add_head_info(struct worktree *wt)
 	target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
 					 "HEAD",
 					 0,
-					 wt->head_sha1, &flags);
+					 wt->head_oid.hash, &flags);
 	if (!target)
 		return;