Don't use evil hacks that make assumptions
about QString internals.
Change-Id: I663602d197f0fcf62886dbfb9a87547097cdab04
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>