[DjMaddius]

Try this, you need to set default values. Also I just cleaned it up a bit.

void driving(){
	double y = 0;           //variable for forward/backward movement
	double x = 0;           //variable for side to side movement
	double turn = 0;        //variable for turning movement
	double deadzone = 0.3;	//variable for amount of deadzone

	if(driverStick.GetY() > deadzone || driverStick.GetY() < -deadzone) {
		y = driverStick.GetY();
	}

	if(driverStick.GetX() > deadzone || driverStick.GetX() < -deadzone) {
		x = driverStick.GetX();
	}

	if(driverStick2.GetX() > deadzone || driverStick2.GetX() < -deadzone){
		turn = driverStick2.GetX();
	}