Segfault in libfltk on 64-bit archlinux

[jaeger]

As the topic suggests, I'm on a 64-bit system, there's no system-wide 32-bit version of fltk on this box and I'm guessing that the one that came with the game (in lib, the one in use) shouldn't segfault.

There's only one thread running at that point it seems, also gdb already pointed to the function that segfaults.