[crossfire] Trouble building Windows client

[Nathaniel Kipps]

In a bizarre twist, a debug build makes the issue vanish. I simply
cannot reproduce it once the CMAKE build type is set to "Debug". For
the adventurous, a copy of the debug build can be found here:
https://drive.google.com/file/d/1QobJhgkMLkBtq4uYhU8G72B2PEbWxYRR/

> This, I don't know. What compiler did you use? If you used MinGW's gcc,
> then gdb should be available as well.

I do use gcc, or at least, whatever comes with MinGW.

--DraugTheWhopper