Updates celtclient to the new API.
Updates celtclient to the new API.

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