hosting_client_validate_suggest() appears broken

According to the code below, from hosting_client.module (lines 273-8), when I attempt to create a client with the same name as an existing client, it should suggest an alternative. This doesn't appear to work, as I always get the "Client name already in use" error instead.

    $suggestion = hosting_client_validate_suggest($node);
    if ($suggestion) {
      form_set_error('title', t("Client name already in use, try @suggestion.", $suggestion));
    } else {
      form_set_error('title', t("Client name already in use."));
    }