Build fails on ARM with -qreal float in qtquickcontrols2

Build fails for ARM when Qt is configured with -qreal float in QtQuick Controls 2.

/home/jeremy/src/qt/qt5/qtquickcontrols2/src/templates/qquickcontrol.cpp:423:62: error: no matching function for call to ‘qMax(double, qreal)’
return qMax(0.0, width() - leftPadding() - rightPadding());

It's an easy fix: 0.0 needs to be cast to a qreal. It happens in lots of places.
I've attached a patch.