PrestaShop/PrestaShop — pull request #511 by SebSept (2013-06-20 10:39:55+00:00)
Title: [.] FO : expiration date not displayed in email for downloadable product

Replaced $virtual_product['date_expiration'] by
$virtual_product['download_deadline'].

Order::getVirtualProducts() doesn't return `date_expiration` field (doesn't exists) but `download_deadline`.