backport r799334: workatround for compiz fullscreen mode
backport r799334: workatround for compiz fullscreen mode

svn path=/trunk/kdesupport/phonon/; revision=812929

sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc