zeromq/libzmq — pull request #444 by vortechs2000 (2012-10-24 13:40:51+00:00)
Title: Fix Build Regression #449: Move socket_base.hpp and err.hpp after poll.h include

Another required change to finish fix for #449:
These two headers also include zmq.h somewhere in their dependency
chain, so must be included after poll.h is included for builds to work
on AIX.