Prevent setTimeout of undefined exception in connection logic

[itsjfx]

I'm still trying to trace what span of events lead to the crash occurring, however this little check fix will prevent a program from throwing an exception. This makes the ChannelEncryptRequest logic only continue if a _connection and stream/socket exists for the login process.

Not a solution to the underlying issue which causes this event of course, but like I said it will stop the exception from occurring.

Solves: #274

[DoctorMcKay]

Not the most elegant solution, but it should work...