Update SilenceWaveProvider.cs

[MagicMau]

Hi,

I am using the SilenceProvider to keep my mixer running and noticed it's using a for-loop to zero out the buffer. I replaced it with Array.Clear() as it is much faster (https://msdn.microsoft.com/en-us/library/system.array.clear%28v=vs.110%29.aspx).
Might be of use to others as well?

[markheath]

thanks for this. there are a few nasty gotchas around using Array.Clear() with the WaveBuffer class but in this case we are safe as it is operating on a byte[] not float[].