bugfix: external program finishes only when its stdout is closed
bugfix: external program finishes only when its stdout is closed

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