message: log fatal unknown others action
diff: @@ -214,7 +214,7 @@ Trajectory BehaviorIDMClassic::Plan(
  } else if (last_action.type() == typeid(LonLatAction)) {
  acc_other = boost::get<LonLatAction>(last_action).acc_lon;
  } else {
  - LOG(WARNING) << "Other's action not known for cah calculation";
  + LOG(FATAL) << "Other's action type unknown in cah calculation";
  }
  }
  }
  