Patched windows poll to behave like linux OS in case we have  empty file descriptor sets.
Patched windows poll to behave like linux OS in case we have  empty file descriptor sets.

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

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