[PATCH] Tweaked --merge-order --show-breaks output in case specified head has no parent

git-rev-list --merge-order --show-breaks root

Was outputing:

| root

It now outputs:

= root

Which is consistent with the behaviour of other cases.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

epoch.c

@@ -536,6 +536,8 @@ static int sort_in_merge_order(struct commit *head_of_epoch, emitter_func emitte
 
 	ret = parse_commit(head_of_epoch);
 
+	next->object.flags |= BOUNDARY;
+
 	while (next && next->parents && !ret && (action != STOP)) {
 		struct commit *base = NULL;