Fix crash when there are no missing users
Fix crash when there are no missing users

Fixes #98 (again)

j16sdiz/hangups,das7pad/hangups,hangoutsbot/hangups,ddboline/hangups,taigrr/hangups,baskervald/hangups,AshenDrops/hangups,jodizzle/hangups,dxd132630/hangups,tdryer/hangups