message: Fix slots in drop messages
diff: @@ -132,7 +132,8 @@ bool inbound_path::up_to_date() {
  void inbound_path::emit_regular_shutdown(local_actor* self) {
  CAF_LOG_TRACE(CAF_ARG(slots));
  - unsafe_send_as(self, hdl, make<upstream_msg::drop>(slots, self->address()));
  + unsafe_send_as(self, hdl,
  + make<upstream_msg::drop>(slots.invert(), self->address()));
  }
  void inbound_path::emit_irregular_shutdown(local_actor* self, error reason) {
  