Coder review - undefined index if module does not have hook_menu()

If I'm running the potx coder review on a module that does not implement hook_menu, I get the following PHP notice error:
notice: Undefined index: statistics_advanced_menu in /home/davereid/Projects/drupal6/sites/all/modules/contrib/potx/potx.inc on line 894.

function _potx_find_menu_hook($file, $filebase, $save_callback) {
  global $_potx_tokens, $_potx_lookup;
  
  if (is_array($_potx_lookup[$filebase .'_menu'])) {

Needs to be changed to:

function _potx_find_menu_hook($file, $filebase, $save_callback) {
  global $_potx_tokens, $_potx_lookup;
  
  if (isset($_potx_lookup[$filebase .'_menu']) && is_array($_potx_lookup[$filebase .'_menu'])) {

and it fixes all the notice errors!