ACF3: Fix cannibals sometimes doing nothing for a full turn This was because hogs got confused because walking was forbidden by SetInputMask. Now we use a proper hedgehog effect heArtillery.

void fpcrtl_halt(int num) {
    __coverity_panic__();
}

int fpcrtl_abs(int num) {
    return num >= 0 ? num : -num;
}