Guset User is not translatable

Hi there,

I'm using vReview 1.9.10 and durig creating Hungarian localization I noticed that the 'Guest User' string (e.g. the name displayed at the top the review panel for reviews made by guest users) is not translatable. I've created a language override, but according to Joomla 2.5 standards the language key (this is created from the string by converting to all uppercase) may not contain any whitespace.

To fix this behaviour I had to change a core file: components/com_review/controller.php on line 3373 by simply changing space to underscore (bold):

if(!empty($username)){
    $userName = $username;
} else {
    $userName = JText::_('GUEST_USER'); // added underscore
}