Warning after undo vote

I have a warning:
"Notice: Undefined offset: 0 in plus1_undo_vote() (line 202 of /sites/all/modules/plus1/plus1.module)."

It because you need use:
$score = isset($results[0]['value']) ? $results[0]['value'] : 0;

instead:
$score = $results[0]['value'] ? $results[0]['value'] : 0;

I think that I do not need to create a patch for this :)
Thanks