no dmg to locked vehicle

/*
   by: http://infiSTAR.de || http://DayzAntiHack.com
*/
[] spawn {
    waituntil {!isnil 'vehicle_handleDamage'};
    if (isNil 'original_vehicle_handleDamage') then {original_vehicle_handleDamage = vehicle_handleDamage;};
    vehicle_handleDamage = {
        private["_obj","_result"];
        _obj = _this select 0;
        _obj allowDamage false;
        if (locked _obj && (count (crew _obj)) == 0) exitWith {};
        _obj allowDamage true;
        _result = _this call original_vehicle_handleDamage;
        _result
    };
};