Comment 55 for bug 1198465

Here is a branch that fixes issue #1 from Dan's comment above (#54). There were two places in the code that needed to be re-taught about the old way of voiding.

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/rsteed/lp1198465-negative-balances-fix-old-voids

At this point, I've only tested with overdues that were generated and voided the old way. Following Kathy's scenario #1 from comment #52 correctly produced a balance of zero. We haven't been able to reproduce the stray overdue fine that Kathy said was created when checking in the lost item, but I need to test that more thoroughly.