message: Support older compiler
diff: @@ -125,7 +125,7 @@ namespace eosio {
  name actor;
  std::tuple<name, name, name> key() const {
  - return {receiver, action, actor};
  + return std::make_tuple(receiver, action, actor);
  }
  friend bool operator<( const filter_entry& a, const filter_entry& b ) {
  