Vote up down points widget doesn't show the correct id

As Simpletest reports, there is something wrong when the vote_up_down_points.tpl.php file outputs the id:

id="vote_points_ print $cid; "

as there's no value inside $cid.

I tried to figured it out and the id will be reported when I change line #312 of vote_up_down.module

'title' => theme('vote_up_down_points', $node->nid, $type),

but i'm not sure that this is the right way to correct it.