Missing return value from nn_sock_destroy() added.
Missing return value from nn_sock_destroy() added.

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

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