Fix handling of latest_read_timestamp=0
Fix handling of latest_read_timestamp=0

j16sdiz/hangups,AshenDrops/hangups,dxd132630/hangups,hangoutsbot/hangups,das7pad/hangups,tdryer/hangups,jodizzle/hangups,taigrr/hangups,ddboline/hangups,baskervald/hangups