Values of BarSet QML type passed via Qt.point() are rounded unexpectedly

Setting the values property like described in http://doc.qt.io/QtCharts/qml-qtcharts-barset.html#values-prop leads to this bug.

But the point QML basic type is converted to QPointF in C++ according to http://doc.qt.io/qt-5/qml-point.html

Examples:

BarSet {
    values: [Qt.point(0, 0.4)];
}

The value will be displayed as 0.

BarSet {
    values: [Qt.point(0, 0.5)];
}

The value will be displayed as 1.