ZSTD_finalizeOffBase
offBase = ZSTD_finalizeOffBase(inSeqs[idx].offset, updatedRepcodes.rep, ll0);
offBase = ZSTD_finalizeOffBase(rawOffset, updatedRepcodes.rep, ll0);
U32 const offBase = ZSTD_finalizeOffBase(inSeqs[seqNb].offset, updatedRepcodes.rep, ll0);