need BIC and SIC change to phonon

[Dirk Mueller]

On Friday 16 November 2007, Matthias Kretz wrote:

> I need to fix an interface class for the phonon backends:
> VolumeFaderInterface has a slightly different function signature as does
> EffectInterface. As backend implementations for VolumeFaderInterface have
> to inherit EffectInterface anyway, the two functions need to simply be
> removed

Hmm, we're trying to be remain BC right now.. can't you fix that without 
breaking BC?