Cart pane hook wrong...?

I am so confused at the code in uc_discounts.module. There is an implementation of hook_cart_pane, but it is completely wrong according to what it should be.... An array of panes should be returned, but instead other calculations are done.

Am I missing something? I can't add the cart pane to my cart page because Ubercart doesn't pick it up. I'm working off the latest dev release. Thanks