pthread/crfpos.cpp: use !empty() instead of 'size() > 0'
pthread/crfpos.cpp: use !empty() instead of 'size() > 0'

claritylab/sirius,yunshengb/lucida,KitoHo/sirius,hoehnp/sirius,niiashikwei/sirius,linearregression/sirius,AlphaStaxLLC/sirius,KitoHo/sirius,KitoHo/sirius,AlphaStaxLLC/sirius,xpndlabs/sirius,niiashikwei/sirius,AlphaStaxLLC/sirius,ryanniehaus/lucida,wathek/sirius,kolewu/sirius,zitterbewegung/sirius,KitoHo/sirius,claritylab/sirius,yqzhang/sirius,KitoHo/sirius,seong889/lucida,yqzhang/sirius,yangeagle/sirius,rowhit/sirius,xpndlabs/sirius,kolewu/sirius,niiashikwei/sirius,hoangt/sirius,apfritts/sirius,kolewu/sirius,seong889/lucida,seong889/lucida,yunshengb/lucida,Vivek065/sirius,enlighter/sirius,erdincay/sirius,yqzhang/sirius,niiashikwei/sirius,yunshengb/lucida,linearregression/sirius,apfritts/sirius,hoehnp/sirius,linearregression/sirius,ffund/sirius,yangeagle/sirius,Vivek065/sirius,AlphaStaxLLC/sirius,madtreat/sirius,Zeioth/sirius,jhauswald/lucida,Zeioth/sirius,madtreat/sirius,hoangt/sirius,ffund/sirius,claritylab/sirius,jhauswald/lucida,seong889/lucida,Zeioth/sirius,madtreat/sirius,Zeioth/sirius,rowhit/sirius,jhauswald/lucida,xpndlabs/sirius,hoangt/sirius,wathek/sirius,Vivek065/sirius,apfritts/sirius,wathek/sirius,zitterbewegung/sirius,yunshengb/lucida,linearregression/sirius,ryanniehaus/lucida,ffund/sirius,erdincay/sirius,yangeagle/sirius,madtreat/sirius,niiashikwei/sirius,AlphaStaxLLC/sirius,jhauswald/lucida,claritylab/sirius,erdincay/sirius,hoehnp/sirius,yunshengb/lucida,Vivek065/sirius,AlphaStaxLLC/sirius,rowhit/sirius,lacvapps/sirius,erdincay/sirius,ffund/sirius,seong889/lucida,yangeagle/sirius,hoehnp/sirius,linearregression/sirius,rowhit/sirius,ryanniehaus/lucida,hoangt/sirius,zitterbewegung/sirius,niiashikwei/sirius,hoehnp/sirius,enlighter/sirius,yqzhang/sirius,hoangt/sirius,yunshengb/lucida,apfritts/sirius,erdincay/sirius,jhauswald/lucida,Zeioth/sirius,enlighter/sirius,enlighter/sirius,xpndlabs/sirius,wathek/sirius,hoehnp/sirius,lacvapps/sirius,hoangt/sirius,seong889/lucida,zitterbewegung/sirius,erdincay/sirius,claritylab/sirius,kolewu/sirius,wathek/sirius,jhauswald/lucida,yqzhang/sirius,yunshengb/lucida,xpndlabs/sirius,linearregression/sirius,ryanniehaus/lucida,KitoHo/sirius,rowhit/sirius,ryanniehaus/lucida,enlighter/sirius,Vivek065/sirius,apfritts/sirius,yunshengb/lucida,ffund/sirius,seong889/lucida,enlighter/sirius,kolewu/sirius,hoehnp/sirius,yqzhang/sirius,rowhit/sirius,zitterbewegung/sirius,kolewu/sirius,enlighter/sirius,lacvapps/sirius,erdincay/sirius,lacvapps/sirius,AlphaStaxLLC/sirius,Zeioth/sirius,lacvapps/sirius,ffund/sirius,zitterbewegung/sirius,wathek/sirius,Zeioth/sirius,yqzhang/sirius,madtreat/sirius,wathek/sirius,seong889/lucida,lacvapps/sirius,apfritts/sirius,jhauswald/lucida,Vivek065/sirius,seong889/lucida,yangeagle/sirius,KitoHo/sirius,kolewu/sirius,yangeagle/sirius,claritylab/sirius,hoangt/sirius,lacvapps/sirius,ffund/sirius,rowhit/sirius,apfritts/sirius,jhauswald/lucida,yangeagle/sirius,zitterbewegung/sirius,Vivek065/sirius,linearregression/sirius,niiashikwei/sirius,xpndlabs/sirius,ryanniehaus/lucida,xpndlabs/sirius,ryanniehaus/lucida,claritylab/sirius,madtreat/sirius,madtreat/sirius