message: Ignore parameters of Flags' LcfSize()
  These are not used anymore.
diff: @@ -68,7 +68,7 @@ void Flags<S>::WriteLcf(const S& obj, LcfWriter& stream) {
  }
  template <class S>
  -int Flags<S>::LcfSize(const S& obj, LcfWriter& /* stream */) {
  +int Flags<S>::LcfSize(const S& /* obj */, LcfWriter& /* stream */) {
  const bool db_is2k3 = (Data::system.ldb_id == 2003);
  int num_bits = 0;
  for (size_t i = 0; i < num_flags; ++i) {
  