uc_catalog_url missing.

Somewhere along the line uc_catalog_url was removed
function uc_catalog_update_2() {
variable_del('uc_catalog_url');
return array(array('success' => TRUE, 'query' => "variable_del('uc_catalog_url')"));
}

But it still has remnants and personally I would have preferred to have this variable as I am having breadcrumb issues since we made a custom catalog page.

Anyways the line is

$crumbs[] = l(variable_get('uc_catalog_name', t('Catalog')), variable_get('uc_catalog_url','catalog'));

Line 171 uc_catalog.module.