Comment 4 for bug 1164575

Thanks for jumping on this, everyone. It's a big, bad one.

I created a formal commit out of Mike's patch. In a separate commit, I also removed the numtype variable declaration to reduce a bit of noise at compile-time, per Jeff's note, and returned some spaces to tabs (sigh) in one line of Mike's patch.

I've pushed those two commits to a branch called lp1164575 in the security repo at <email address hidden>:security/Evergreen. And I've applied the patch to our production system as of an hour ago (using the hot-fix methods documented at http://evergreen-ils.org/blog/?p=884) to get some real-world testing in.