Unable to populate custom fields using the API

I created a custom fields group and some custom fields for contact type=Organization, but attempting to create new contacts using the API yields an "Invalid custom field ID" error.

In api/utils.php ~line 298:

$customFields = CRM_Core_BAO_CustomField::getFields();

should be:

$customFields = CRM_Core_BAO_CustomField::getFields($values['contact_type']);