Wayfinder error - undefined var $useClass

My event log is full of an error for undefined var in wayfinder.inc.php
Undefined var is $useClass

Changed line 124 -
from: if ($classNames) $useClass = ' class="' . $classNames . '"';
to: $useClass=($classNames)?' class="' . $classNames . '"':'';

Same thing happens on line 173

This cleaned up all the event log errors. Thanks.