make total_paid available on confirmation tpl page

OrderConfirmationController.php

<?php
/* Michael Hjulskov
*/
class OrderConfirmationController extends OrderConfirmationControllerCore
{
	public function initContent()
	{
		parent::initContent();

		$order = new Order($this->id_order);
		if (Validate::isLoadedObject($order)){
			$this->context->smarty->assign('total_paid', $order->total_paid); // used for adwords conversion tracking
		}

	}

}