Fix to usage of upper bound value in volume curve

    // Where would this volume index been inserted in the curve point

    size_t indexInUiPosition = mCurvePoints.orderOf(CurvePoint(volIdx, 0));

    if (indexInUiPosition >= nbCurvePoints) {

        return 0.0f; // out of bounds

        //use last point of table

        return mCurvePoints[nbCurvePoints - 1].mAttenuationInMb / 100.0f;

    }

    if (indexInUiPosition == 0) {

        if (indexInUiPosition != mCurvePoints[0].mIndex) {