Since pocsag is added some date are invalid

[tomswinkels]

Since the pocsag is added to this project there are in the flex protocol invalid messages.

payload { "body": "-", "capcodes": [ "1323864", "1321752" ], "groupid": 0, "is_posted": false, "priority": 2, "receivers": "1323864, 1321752", "sender": 67, "timereceived": 1554798018.4470956, "timestamp": "2019-04-09 09:20:18" }

You see here a sender and before the pocsag it was not.