cb firing multiple times

[lperrin]

Near line 178, this code doesn't set cbFired to true:

onError = function(reason) {
        if (!cbFired && typeof cb === 'function') {
          cb(new Error(reason));
        }
      },
      onClose = function() {
        if (!cbFired && typeof cb === 'function') {
          cb();
        }
      },

If a TCP error occurs, the callback is called twice.

[felixge]

@lperrin I just made you a contributor on github, feel free to push your suggested fix!

[lperrin]

I'll do that, thanks :)