message: Fix inspect function of downstream_path
diff: @@ -57,9 +57,9 @@ public:
  };
  template <class Inspector>
  -typename Inspector::return_type inspect(Inspector& f, downstream_path& x) {
  - return f(meta::type_name("upstream_path"), x.next_batch_id, x.open_credit,
  - x.redeployable, x.unacknowledged_batches);
  +typename Inspector::result_type inspect(Inspector& f, downstream_path& x) {
  + return f(meta::type_name("downstream_path"), x.hdl, x.next_batch_id,
  + x.open_credit, x.redeployable, x.unacknowledged_batches);
  }
  } // namespace caf
  