bugfix: nr_maps was not determined correctly for dir:// inputs as a result, the web ui showed negative values for the number of maps waiting
bugfix: nr_maps was not determined correctly for dir:// inputs
as a result, the web ui showed negative values for the number of maps waiting

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