ZMQ: Fix off by 1 error in NotifyStalledWitness ZMQ code.
ZMQ: Fix off by 1 error in NotifyStalledWitness ZMQ code.

nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official