usock_posix.c slightly beautified
usock_posix.c slightly beautified

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

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