Fix window size issue under Windows CE

Fix window size issue under Windows CE

Under Windows CE the top title window bar needs
to be taken into account when creating a window,
so the Style WS_OVERLAPPED needs to be passed to
AdjustWindowRectEx, to get the right size of the
window. For the desktop the documentation says,
that you should not pass the WS_OVERLAPPED flag,
but wince does not talk about this.

Change-Id: Id8c9d28b7aa04a9920e4cb81ac11463d9717a0e7
Reviewed-by: Björn Breitmeyer <bjoern.breitmeyer@kdab.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>