$form=new PlekitForm(l_actions(), array("tag_type_id"=>$tag_type_id));
$form->start();
-$toggle=new PlekitToggle ('roles',count_english($roles,"role"),array('visible'=>get_arg('show_roles',false)));
+$toggle=new PlekitToggle ('roles',count_english($roles,"role"),array('visible'=>get_arg('show_roles')));
$toggle->start();
if (! $roles) plc_warning ("This tag type has no role !");