MSDEToText for TMG sometimes produces negative IP addresses

... which can be annoying when you're trying to work out where your traffic's headed, with something like LogParser.

I fixed my MSDEToTSV (note, I renamed it so that it reminded me what format it produces - I only need to use it once in a blue moon), and I'm posting the fixed version here in case you'd like a copy.

The edits were just to the IpFromDbl function.