Websockets don't close properly #2
Description
When an actual Websocket is closed from the browser (e.g. by closing the window) the server says:
~ WS#close(nil, nil, false)
~ Error closing websocket (#<Faye::WebSocket::API::Event:0xb1ac8d0 @): #<TypeError: Integer object expected, but object is an instance of NilClass (object: nil).>
And keeps sending heartbeats.