reflog-walk: convert struct reflog_info to struct object_id

Convert struct reflog_info to use struct object_id by changing the
structure definition and applying the following semantic patch:

@@
struct reflog_info E1;
@@
- E1.osha1
+ E1.ooid.hash

@@
struct reflog_info *E1;
@@
- E1->osha1
+ E1->ooid.hash

@@
struct reflog_info E1;
@@
- E1.nsha1
+ E1.noid.hash

@@
struct reflog_info *E1;
@@
- E1->nsha1
+ E1->noid.hash

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

reflog-walk.c

@@ -10,7 +10,7 @@ struct complete_reflogs {
 	char *ref;
 	const char *short_ref;
 	struct reflog_info {
-		unsigned char osha1[20], nsha1[20];
+		struct object_id ooid, noid;
 		char *email;
 		unsigned long timestamp;
 		int tz;
@@ -28,8 +28,8 @@ static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1,
 
 	ALLOC_GROW(array->items, array->nr + 1, array->alloc);
 	item = array->items + array->nr;
-	hashcpy(item->osha1, osha1);
-	hashcpy(item->nsha1, nsha1);
+	hashcpy(item->ooid.hash, osha1);
+	hashcpy(item->noid.hash, nsha1);
 	item->email = xstrdup(email);
 	item->timestamp = timestamp;
 	item->tz = tz;
@@ -238,13 +238,13 @@ void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
 	do {
 		reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
 		commit_reflog->recno--;
-		logobj = parse_object(reflog->osha1);
+		logobj = parse_object(reflog->ooid.hash);
 	} while (commit_reflog->recno && (logobj && logobj->type != OBJ_COMMIT));
 
-	if (!logobj && commit_reflog->recno >= 0 && is_null_sha1(reflog->osha1)) {
+	if (!logobj && commit_reflog->recno >= 0 && is_null_sha1(reflog->ooid.hash)) {
 		/* a root commit, but there are still more entries to show */
 		reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
-		logobj = parse_object(reflog->nsha1);
+		logobj = parse_object(reflog->noid.hash);
 	}
 
 	if (!logobj || logobj->type != OBJ_COMMIT) {