QPainter drawText with rotated transform leaks GDI handles

Calling QPainter.drawText with a rotated transform will leak a GDI handle for each glyph. On Windows 7, the application will crash when the GDI handle count reaches 10000. This can happen quite rapidly as shown in the attached demo project.

BUG FOUND IN:
/qtbase/src/plugins/platforms/windows/qwindowsfontengine.cpp (line 1113)

SOLUTION:
Change 'ReleaseDC(0, hdc);' to 'DeleteDC(hdc);'

A similar bug may also be found in:
/qtbase/src/plugins/platforms/windows/qwindowsfontdatabase.cpp (line 536)