small fixes to disco_worker
small fixes to disco_worker

seabirdzh/disco,mwilliams3/disco,mozilla/disco,mwilliams3/disco,pombredanne/disco,oldmantaiter/disco,ktkt2009/disco,mwilliams3/disco,discoproject/disco,simudream/disco,discoproject/disco,seabirdzh/disco,pombredanne/disco,pooya/disco,pombredanne/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,pavlobaron/disco_playground,ktkt2009/disco,oldmantaiter/disco,scrapinghub/disco,ktkt2009/disco,pombredanne/disco,beni55/disco,pavlobaron/disco_playground,ErikDubbelboer/disco,mwilliams3/disco,oldmantaiter/disco,mozilla/disco,mozilla/disco,pavlobaron/disco_playground,beni55/disco,scrapinghub/disco,mozilla/disco,ktkt2009/disco,seabirdzh/disco,mwilliams3/disco,oldmantaiter/disco,discoproject/disco,simudream/disco,simudream/disco,pavlobaron/disco_playground,pooya/disco,scrapinghub/disco,seabirdzh/disco,beni55/disco,seabirdzh/disco,discoproject/disco,ktkt2009/disco,scrapinghub/disco,beni55/disco,pombredanne/disco,pooya/disco,pooya/disco,simudream/disco,ErikDubbelboer/disco,oldmantaiter/disco,discoproject/disco,beni55/disco,simudream/disco