HUF_readCTableHeader
HUF_CTableHeader HUF_readCTableHeader(HUF_CElt const* ctable);
U32 const tableLog = HUF_readCTableHeader(CTable).tableLog;
assert(HUF_readCTableHeader(CTable).maxSymbolValue == maxSymbolValue);
assert(HUF_readCTableHeader(CTable).tableLog == huffLog);
if (symbolValue > HUF_readCTableHeader(CTable).maxSymbolValue)
HUF_CTableHeader header = HUF_readCTableHeader(CTable);