[FIX]Permissions.php: Fix undefined variables permType and additional
requested to merge bkinywa24/tiki:fix-undefined-variables-permType-additional-in-Permissions.php into master
This is to fix ERROR (E_WARNING): Undefined variable $permType and ERROR (E_WARNING): Undefined variable $additional in Permissions.php on master when we are using this module in a wiki page like {MODULE(module=permissions)}. {MODULE}.