Notice: Undefined variable from menus.php

-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7.4
-- PHP version -- : 7.0
-- Error-message(debug-mod must be tuned on) -- : Notice: Undefined variable: task in ...\administrator\components\com_hikashop\classes\menus.php on line 210

Line 210 should be replaced by...

if (!empty($task)) {
  $menu_id = (int)$this->loadAMenuItemId('checkout', $task);
}