Mismatch of definition and declaration of output signal in ivas_core_dec()

The declaration of the function ivas_core_dec() in lib_com/ivas_prot.h uses output signal size of

float *output[CPE_CHANNELS],                                /* o  : output synthesis signal                 */

The definition in lib_dec/ivas_core_dec.c uses

float *output[L_FRAME48k],                   /* o  : output synthesis signal            */