Minor travis build fix for missing change in zmq in commit 6bc4dfbbb765c3b2ef070888cc9e8ff4d7e4e912
Minor travis build fix for missing change in zmq in commit 6bc4dfbbb765c3b2ef070888cc9e8ff4d7e4e912

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