Default constructor case

Author: apocas

lib/docker.js

@@ -20,8 +20,10 @@ var EventEmitter = require('events').EventEmitter,
 
 var Docker = function(opts) {
   if (!(this instanceof Docker)) return new Docker(opts);
+
   this.modem = new Modem(opts);
-  this.modem.Promise = opts.Promise || global.Promise;
+
+  this.modem.Promise = opts && opts.Promise || global.Promise;
 };
 
 /**

package.json

@@ -1,7 +1,7 @@
 {
   "name": "dockerode",
   "description": "Docker Remote API module.",
-  "version": "2.3.3",
+  "version": "2.3.4",
   "author": "Pedro Dias <petermdias@gmail.com>",
   "maintainers": [
     "apocas <petermdias@gmail.com>"