nn_cmsg_nexthdr_ now marked as NN_EXPORT
nn_cmsg_nexthdr_ now marked as NN_EXPORT

Signed-off-by: Martin Sustrik <4dd6061be1198639e8b05ce4fd5ead7a0dcaa0f4@250bpm.com>

tempbottle/nanomsg,tempbottle/nanomsg,imp/nanomsg,nirs/nanomsg,potatogim/nanomsg,zerotacg/nanomsg,JackDunaway/featherweight-nanomsg,imp/nanomsg,cosin2008/nanomsg.NET,modulexcite/nanomsg,pch957/nanomsg,pakozm/nanomsg,snikulov/nanomsg,yan97ao/nanomsg,zerotacg/nanomsg,imp/nanomsg,JackDunaway/featherweight-nanomsg,simplestbest/nanomsg,pch957/nanomsg,hyperfact/nanomsg,TTimo/nanomsg,nirs/nanomsg,reqshark/nanomsg,krafczyk/nanomsg,wirebirdlabs/featherweight-nanomsg,simplestbest/nanomsg,featherweight/ftw-kernel-nanomsg,potatogim/nanomsg,gdamore/mamomsg,wfxiang08/nanomsg,simplestbest/nanomsg,snikulov/nanomsg,smithed/nanomsg,smithed/nanomsg,cosin2008/nanomsg.NET,ttyangf/nanomsg,wfxiang08/nanomsg,reqshark/nanomsg,zerotacg/nanomsg,krafczyk/nanomsg,potatogim/nanomsg,pch957/nanomsg,gdamore/mamomsg,ttyangf/nanomsg,smithed/nanomsg,gdamore/mamomsg,TTimo/nanomsg,yan97ao/nanomsg,thisco-de/nanomsg,featherweight/ftw-kernel-nanomsg,wirebirdlabs/featherweight-nanomsg,pakozm/nanomsg,cosin2008/nanomsg.NET,wirebirdlabs/featherweight-nanomsg,nirs/nanomsg,reqshark/nanomsg,krafczyk/nanomsg,linearregression/nanomsg,TTimo/nanomsg,yan97ao/nanomsg,hyperfact/nanomsg,linearregression/nanomsg,ttyangf/nanomsg,modulexcite/nanomsg,wfxiang08/nanomsg,TTimo/nanomsg,linearregression/nanomsg,pakozm/nanomsg,smithed/nanomsg,modulexcite/nanomsg,tempbottle/nanomsg,ttyangf/nanomsg,JackDunaway/featherweight-nanomsg,hyperfact/nanomsg,thisco-de/nanomsg