updated avoid the second use of query in install.php

Florian Schaal

2015-05-07 bb690d44eb8cbfce446b5bf023cdc7bd47a53fdb

1
ALTER TABLE `client` ADD `customer_no` VARCHAR( 64 ) NULL AFTER `contact_name` , ADD `vat_id` VARCHAR( 64 ) NULL AFTER `customer_no`;