Merge branch 'dev' of http://gitlab.fjmaimaimai.com/mmm-go/oppmg into dev

@@ -186,7 +186,9 @@ func (this *BulletinController) BulletinFeedbacks() {
 func (this *BulletinController) ExportFeedBacks() {
 	var msg *protocol.ResponseMessage
 	defer func() {
+		if msg.Errno != 0 {
 			this.ResposeJson(msg)
+		}
 	}()
 	var request *protocol.ExportFeedBacksRequest
 	if err := json.Unmarshal(this.Ctx.Input.RequestBody, &request); err != nil {