volumeslider: Ignore the first volume change observation.
volumeslider: Ignore the first volume change observation.

As the slider value is set to the current volume when it's created,
this would trigger the sliderChange signal and actually cause
the volume to be written. By setting the flag to true initially,
we avoid this unnecessary operation.

KDE/phonon-mmf,KDE/phonon-waveout,KDE/phonon-directshow,KDE/phonon-xine,KDE/phonon-gstreamer,KDE/phonon-quicktime,shadeslayer/phonon-gstreamer,KDE/phonon-directshow,KDE/phonon-gstreamer,KDE/phonon-xine,shadeslayer/phonon-gstreamer,shadeslayer/phonon-gstreamer,KDE/phonon-xine