Fix a bug where calling .end() on a socket without calling .connect() first
throws a TypeError:
TypeError: Cannot read property 'shutdown' of undefined
at Socket.onSocketFinish (net.js:194:20)
at Socket.EventEmitter.emit (events.js:91:17)
at Socket.Writable.end (_stream_writable.js:281:10)
at Socket.end (net.js:352:31)
Fixes #4463.
debug('oSF: not ended, call shutdown()');
// otherwise, just shutdown, or destroy() if not possible
- if (!this._handle.shutdown)
+ if (!this._handle || !this._handle.shutdown)
return this.destroy();
var shutdownReq = this._handle.shutdown();