Stacking order of QGraphicsVideoItem is inverted on Symbian

Using the videographicsitem app from multimediakit.zip (attached to QTMOBILITY-1321):

1. Launch app, passing two video filenames on the command line (e.g. videographicsitem.exe foo.3gp bar.3gp)
2. Select "Options | Add next video"
3. Tapping on either of the two videos should change its z-order to bring it to the front
   Actual behaviour: z-orders are modified, but in the wrong direction