Function get_attribute_no_data

LASlib/inc/lasreader.hpp:420–422

    return attribute_offsets[index];
  };
  F64 get_attribute_no_data(U32 index) const {
    return attribute_no_datas[index];
  };
  void set_copc_stream_ordered_by_chunk() {
    copc_stream_order = 0;
  };