Added a DCT in time direction when multiple MDCTs are used within the same frame.
Added a DCT in time direction when multiple MDCTs are used within the same
frame.

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