Missing check for search404_disable_error_message

There is a bit of code, which I've managed to trigger on line 205 of search404.module that displays the following message to a logged in user, in some circumstances, when you hit a 404

"The page you requested does not exist. For your convenience, a search was performed using the query %keys".

Code change below required. I'm not sure if this was intentional or not?

index 7e1fb55..01a8185 100644
--- a/docroot/sites/all/modules/contrib/search404/search404.module
+++ b/docroot/sites/all/modules/contrib/search404/search404.module
@@ -202,7 +202,9 @@ function search404_page() {
         else {
           // Normal $results['#results'] doesn't exist, we will not redirect
           // and just hope the strange search module knows how to render its output.
-          drupal_set_message(t('The page you requested does not exist. For your convenience, a search was performed using the query %keys.', array('%keys' => check_plain($keys))), 'error');
+          if (!variable_get('search404_disable_error_message', FALSE)) {
+            drupal_set_message(t('The page you requested does not exist. For your convenience, a search was performed using the query %keys.', array('%keys' => check_plain($keys))), 'error');
+          }
         }
       }
     }