Fix warnings.
Fix warnings.

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

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