Comment # 1 on bug 980607 from Fabian Vogt

Fixed in the Plasma 5.8 sddm theme:

            showUserList: {
                 if ( !userListModel.hasOwnProperty("count")
                   || !userListModel.hasOwnProperty("disableAvatarsThreshold"))
                     return true

                 if ( userListModel.count == 0 ) return false

                 return userListModel.count <=
userListModel.disableAvatarsThreshold
            }