Ensure we don't examine empty token
Ensure we don't examine empty token

Fixes issue #163.

googlearchive/cayley,deskr/cayley,zorojean/cayley,karabijavad/cayley,posenhuang/cayley,praisondani/cayley,jacobxk/cayley,h4ck3rm1k3/cayley,zorojean/cayley,skynet/cayley,beni55/cayley,h4ck3rm1k3/cayley,barakmich/cayley,abhishekgahlot/cayley,jzelinskie/cayley,tmlbl/cayley,panamafrancis/cayley,cayleygraph/cayley,samanalysis/cayley,pombredanne/cayley,barakmich/cayley,h4ck3rm1k3/cayley,posenhuang/cayley,jacobxk/cayley,mjolk/cayley,kortschak/cayley,deskr/cayley,mjolk/cayley,panamafrancis/cayley,bashtian/cayley,agupta666/cayley,praisondani/cayley,barakmich/cayley,OrenBochman/cayley,gmbuell/cayley,Kavec/cayley,Kavec/cayley,1d4Nf6/cayley,hiteshjoshi/cayley,dushmis/cayley,karabijavad/cayley,dushmis/cayley,sdaros/cayley,1d4Nf6/cayley,sdaros/cayley,deskr/cayley,abhishekgahlot/cayley,hiteshjoshi/cayley,Kavec/cayley,jacobxk/cayley,dtkav/cayley,sdaros/cayley,1d4Nf6/cayley,jzelinskie/cayley,sayden/cayley,jacobxk/cayley,gmbuell/cayley,tmlbl/cayley,bashtian/cayley,zorojean/cayley,barakmich/cayley,pombredanne/cayley,LAlbertalli/cayley,h4ck3rm1k3/cayley,HomeMango0310/cayley,abhishekgahlot/cayley,dtkav/cayley,agupta666/cayley,dushmis/cayley,ominux/cayley,agupta666/cayley,sayden/cayley,kortschak/cayley,zorojean/cayley,gmbuell/cayley,HomeMango0310/cayley,tmlbl/cayley,karabijavad/cayley,dushmis/cayley,pombredanne/cayley,gmbuell/cayley,HomeMango0310/cayley,beni55/cayley,LAlbertalli/cayley,h4ck3rm1k3/cayley,dtkav/cayley,skynet/cayley,barakmich/cayley,drhodes/cayley,googlearchive/cayley,bashtian/cayley,praisondani/cayley,jzelinskie/cayley,posenhuang/cayley,LAlbertalli/cayley,tmlbl/cayley,deskr/cayley,skynet/cayley,ominux/cayley,googlearchive/cayley,azylman/cayley,mjolk/cayley,kortschak/cayley,samanalysis/cayley,hiteshjoshi/cayley,HomeMango0310/cayley,beni55/cayley,mjolk/cayley,samanalysis/cayley,Kavec/cayley,1d4Nf6/cayley,sdaros/cayley,drhodes/cayley,samanalysis/cayley,sayden/cayley,azylman/cayley,pombredanne/cayley,LAlbertalli/cayley,cayleygraph/cayley,ominux/cayley,praisondani/cayley,ominux/cayley,OrenBochman/cayley,panamafrancis/cayley,azylman/cayley,OrenBochman/cayley,sayden/cayley,azylman/cayley,hiteshjoshi/cayley,kortschak/cayley,posenhuang/cayley,jzelinskie/cayley,drhodes/cayley,drhodes/cayley,dtkav/cayley,googlearchive/cayley,abhishekgahlot/cayley,agupta666/cayley,skynet/cayley,panamafrancis/cayley,deskr/cayley,OrenBochman/cayley,karabijavad/cayley,kortschak/cayley,beni55/cayley