Fix a dialyzer warning.
Fix a dialyzer warning.

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