Confirm template's postback is not sent correctly

[furyutei]

Text message 'undefined' was sent, when I pressed button of confirm template.

[kenakamu]

Thanks! May i know the confirm template data you sent to the simulator? This may be affect other place and in that case we want to fix it in one shot.

[furyutei]

For example,

{
	"type": "template",
	"altText": "登録しますか？\n",
	"template": {
		"type": "confirm",
		"text": "登録しますか？\n",
		"actions": [
			{
				"type": "postback",
				"label": "はい",
				"data": "yes",
				"displayText": "はい"
			},
			{
				"type": "postback",
				"label": "いいえ",
				"data": "no",
				"displayText": "いいえ"
			}
		]
	}
}

In this case, when a control associated with this action is tapped, a postback event is returned(
although displayText is displayed on the application screen, a message event is not returned) in the real environment.

I'm sorry, my pull request was not enough, because it is not assumed when the type of action is "message".

[kenakamu]

Thanks!
Please check native-app branch as well, because I will update that branch only in the future