[Maintenance]fix compiler errors when DEBUG_MODE_DFT is enabled
Some remaining cleanup from moving res_cod_bits to the hStereoDft handle: code does not build with DEBUG_MODE_DFT enabled.
WARNING! Gitlab maintenance operation scheduled for Saturday, 27 September 2025, from 07:00 AM to 4:00 PM GMT (09:00 AM to 6:00 PM CEST)
Some remaining cleanup from moving res_cod_bits to the hStereoDft handle: code does not build with DEBUG_MODE_DFT enabled.