struct name_entry: use struct object_id instead of unsigned char sha1[20]

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/reflog.c b/builtin/reflog.c
index 2d46b64..7a7136e 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -84,8 +84,8 @@
 	init_tree_desc(&desc, tree->buffer, tree->size);
 	complete = 1;
 	while (tree_entry(&desc, &entry)) {
-		if (!has_sha1_file(entry.sha1) ||
-		    (S_ISDIR(entry.mode) && !tree_is_complete(entry.sha1))) {
+		if (!has_sha1_file(entry.oid->hash) ||
+		    (S_ISDIR(entry.mode) && !tree_is_complete(entry.oid->hash))) {
 			tree->object.flags |= INCOMPLETE;
 			complete = 0;
 		}