Conversion to 18-band split and fixed a few related bugs.
Conversion to 18-band split and fixed a few related bugs.

mumble-voip/celt-0.7.0,oneman/opus-oneman,mumble-voip/celt-0.11.0,dezelin/celt,mumble-voip/celt-0.7.0,dezelin/celt,mumble-voip/celt-0.11.0,Distrotech/celt,mumble-voip/celt-0.7.0,mumble-voip/celt-0.11.0,Distrotech/celt,dezelin/celt,Distrotech/celt,oneman/opus-oneman,oneman/opus-oneman