don't crash in fromIndex if no backend is available - thanks to PutHuhn
don't crash in fromIndex if no backend is available - thanks to PutHuhn

svn path=/trunk/KDE/kdelibs/phonon/; revision=686656

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