empty fieldset if multilingual support disabled

If you have multilingual support disabled for a certain node type, you still get an empty fieldset on the edit node form. The code from i18n.inc line 185 ($form['i18n'] = array('#type' => 'fieldset' ...) should be moved into if(variable_get('i18n_node_'.$form['type']['#value'], 0) ... block. That hides the fieldset together with the selection box.