bug ec_checkout.module (ecommerce 5.x-4.0-alpha11.)

If I buy downloadable product, I not recieve mail about my order.

Error in this code (~line 650, function - ec_checkout_review_form_submit):

if ($txn->gross <= 0) {
store_send_invoice_email($txn->txnid); // ERROR HERE
drupal_set_message(t('Your order has been submitted.'));
return '';
}

Parameter of function store_send_invoice_email the object. In this code this funciton give ID.

This bug may be fixed like here
if ($txn->gross <= 0) {
store_send_invoice_email($txn);
drupal_set_message(t('Your order has been submitted.'));
return '';
}