Fixes #119 (VS build problem)
Fixes #119 (VS build problem)

benjamg/zmqpp,benjamg/zmqpp,chenwenbin928/zmqpp,sunkin351/zmqpp,zeromq/zmqpp,datasift/zmqpp,kernelim/zmqpp,xaqq/zmqpp,zeromq/zmqpp,sunkin351/zmqpp,xaqq/zmqpp,pin3da/zmqpp,pin3da/zmqpp,datasift/zmqpp,kernelim/zmqpp,chenwenbin928/zmqpp