Zero prices not summed properly

[msrgi]

Hi there,

if a product has an override price of zero, as we want to give it away for free, it
seems that the cart then only sums the discount and shows no number
for the final price. This might be a bit confusing for customers, when they
merely see the summed discount on the total price line.

Is there a quick fix for this?

Thank you
Kris