opencart/opencart — pull request #1101 by kabatza (2013-12-27 12:32:26+00:00)
Title: Update success.php

If totals are not unset on success, store credit can be double spent using the multiple browser method and cause negative store credit balance.
I cannot think of any reaon why totals should not be unset on order success, so I have added one line for doing so.