Fix low gravity utility not working in Gravity script (fixes #13) Using low gravity halves the gravity. For using a range, both the minimum and maximum gravities are halved. Negative gravities are doubled. Bonus: game modifier “low gravity” will be force-disabled.

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

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