CRM_Core_BAO_CustomValueTable::setValues doesn't let you set ContactReference values

When you try to set a ContactReference custom field's value to a contact_id using CRM_Core_BAO_CustomValueTable::setValues, you get a fatal error from CRM_Utils_Type::escape saying "Cannot recognize ContactReference for [contact_id]" because it doesn't know how to handle ContactReference types.

Is the fix just to add a ContactReference case to the Integer / Int case? If so, I can do that easily enough.

Steps to replicate:
1. Run this code ('custom_3' must be a custom field of ContactReference type, 123 should be the id of a Contribution object, and 456 should be a valid Contact id):
$params = array( 'entityID' => 123, 'custom_3' => 456);
require_once 'CRM/Core/BAO/CustomValueTable.php';
CRM_Core_BAO_CustomValueTable::setValues( $params );

A fatal error will be generated by CRM_Utils_Type::escape when the ContactReference type falls through the switch to the default case.