Database query in function menu_clone_clone_form_submit is wrong

Thank you for this module!
I have tried module, and my experience was that the database query in function menu_clone_clone_form_submit is wrong.

Original version:

function menu_clone_clone_form_submit($form, &$form_state) {
  $menu = $form_state['values'];
  $path = 'admin/structure/menu/manage/';
  $menu['menu_name'] = 'menu-' . $menu['menu_name'];
  $link['link_title'] = $menu['title'];
  $link['link_path'] = $path . $menu['menu_name'];
  $link['router_path'] = $path . '%';
  $link['module'] = 'menu';
  $link['plid'] = db_query("SELECT mlid FROM {menu_links} WHERE link_path = :link_path AND module = :module", array(':link_path' => 'admin/build/menu', ':module' => 'system'))->fetchField();

I think, this is the right solution:

function menu_clone_clone_form_submit($form, &$form_state) {
  $menu = $form_state['values'];
  $path = 'admin/structure/menu/manage/';
  $menu['menu_name'] = 'menu-' . $menu['menu_name'];
  $link['link_title'] = $menu['title'];
  $link['link_path'] = $path . $menu['menu_name'];
  $link['router_path'] = $path . '%';
  $link['module'] = 'menu';
  $link['plid'] = db_query("SELECT mlid FROM {menu_links} WHERE link_path = :link_path AND module = :module", array(':link_path' => 'admin/structure/menu', ':module' => 'system'))->fetchField();