message: Fix segfault in error handling
  In the case that we did not find a node we also cannot call
  (**node).name() since we never assigned *node.
  Fix this by printing node_name.
diff: @@ -307,7 +307,7 @@ void UpdateToEngineNode(const std::vector<EngineInfo>& infos,
  }
  }
  }
  - LOG(FATAL) << "Node " << (**node).name() << " not found in any engine.";
  + LOG(FATAL) << "Node " << node_name << " not found in any engine.";
  }
  // Function to insert a TRT engine node into the graph.
  