Fix sinegun dealing 1 damage when shooting straight up. Reduces sine gun knockback strength by 1.25% This was caused by AmmoShove, which had a strenght which was *right* above the threshold for fall damage.

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void fpcrtl_halt(int num) {

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    __coverity_panic__();

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}

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int fpcrtl_abs(int num) {

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    return num >= 0 ? num : -num;

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}