[cleanup] accept COMBINED_FORMAT_SIGNALING

/*#define FIX_XXX_JBM_FIFO_BUFFER  */                   /* FhG: prevent wraparound of a length identifier in cause of large frames and many channels*/

#define COMBINED_FORMAT_SIGNALING                       /* VA: Introduce a signaling bit for combined format coding */

#define FIX_356_ISM_METADATA_SYNC                       /* Eri: issue 356: Metadata out-of-synch for -no_delay_comp */