Fixes for the "stable" build

Anyway, it only took a day and a half to find two critical flaws 3d8d271 and 5fd216a. Great job me.

Though this time these aren't user bugs and more lean towards security exploits.

Advice of the day: Use static code checkers (cppcheck), -Wall and code fuzzers (if you're into this sort of thing)

Also attached are the patched Windows binaries.