message: Fix compilation when old query engine fallback is disabled.
diff: @@ -206,10 +206,11 @@ int no_timestamp(const Timestamp&)
  REALM_ASSERT(false);
  return 0;
  }
  -#endif // REALM_OLDQUERY_FALLBACK
  } // anonymous namespace
  +#endif // REALM_OLDQUERY_FALLBACK
  +
  template <class T>
  struct Plus {
  T operator()(T v1, T v2) const
  