Fixed open JSON object message.

Previously:
```Text
                "64": {
                    "restart flags":,
                    "address family flags": {},
                    "name": "graceful restart",
                    "time": 120
                },
```
Now:
```Text
                "64": {
                    "restart flags": [],
                    "address family flags": {},
                    "name": "graceful restart",
                    "time": 120
                },
```