fix early exit from 0-worker mode train loop
fix early exit from 0-worker mode train loop

tzoiker/gensim,markroxor/gensim,laic/gensim,manasRK/gensim,dsquareindia/gensim,summanlp/gensim,ziky90/gensim,jaksmid/gensim,ziky90/gensim,mattilyra/gensim,ELind77/gensim,loisaidasam/gensim,olavurmortensen/gensim,bhargavvader/gensim,jaksmid/gensim,RaRe-Technologies/gensim,markroxor/gensim,bhargavvader/gensim,ELind77/gensim,piskvorky/gensim,quole/gensim,gojomo/gensim,olavurmortensen/gensim,summanlp/gensim,loisaidasam/gensim,macks22/gensim,manasRK/gensim,Kreiswolke/gensim,Kreiswolke/gensim,RaRe-Technologies/gensim,pombredanne/gensim,piskvorky/gensim,mattilyra/gensim,summanlp/gensim,akutuzov/gensim,quole/gensim,tzoiker/gensim,pombredanne/gensim,RaRe-Technologies/gensim,akutuzov/gensim,markroxor/gensim,tzoiker/gensim,laic/gensim,gojomo/gensim,zachmayer/gensim,isohyt/gensim,robotcator/gensim,pombredanne/gensim,loisaidasam/gensim,RaRe-Technologies/gensim,isohyt/gensim,mattilyra/gensim,dsquareindia/gensim,bhargavvader/gensim,akutuzov/gensim,ziky90/gensim,zachmayer/gensim,ELind77/gensim,davechallis/gensim,manasRK/gensim,piskvorky/gensim,gojomo/gensim,isohyt/gensim,zachmayer/gensim,robotcator/gensim,robotcator/gensim,dsquareindia/gensim,davechallis/gensim,macks22/gensim,macks22/gensim,davechallis/gensim,olavurmortensen/gensim,gojomo/gensim,quole/gensim,jaksmid/gensim,Kreiswolke/gensim,laic/gensim