Fix #135 - Don't save or use -32000 win positions

Haven't really tested this yet, but I think this should fix it.

If you want to hold off merging it that's ok. I'll do some testing on it now.

I decided to add the checks on load for -32000 too. That way it will sort this problem out for anyone who experienced it, without having to do the winkey+right trick. We can probably wait a few versions and then safely remove those checks.