Postgres Install fails

Line 103 in custom_breadcrumbs.install has to be changed so that the upgrade works in Postgres:
db_add_column($ret, 'custom_breadcrumb', 'visibility_php', 'text', array('default' => ''));
has to be changed to
db_add_column($ret, 'custom_breadcrumb', 'visibility_php', 'text', array('default' => "''"));

--> otherwise you get an SQL error:
ALTER TABLE drupal_custom_breadcrumb ALTER visibility_php SET default
does not work because '' is missing at the end.

Thanks,
Reinhard