fix global leaks

lib/stomp-exceptions.js

@@ -1,4 +1,4 @@
-QueueEmpty = exports.QueueEmpty = function() {
+var QueueEmpty = exports.QueueEmpty = function() {
     this.name = "QueueEmpty";
     this.message = "Queue is Empty";
 };

lib/stomp-utils.js

@@ -1,7 +1,7 @@
 var exceptions = require('./stomp-exceptions');
 var sys = require('util');
 
-StompLogging = exports.StompLogging = function(should_debug) {
+var StompLogging = exports.StompLogging = function(should_debug) {
     this.should_debug = should_debug;
 };
 
@@ -26,7 +26,7 @@ StompLogging.prototype.die = function(message) {
     this.error(message, true);
 };
 
-StompUtils = exports.StompUtils = function() {
+var StompUtils = exports.StompUtils = function() {
     this.available_utils = [];
 };
 

lib/stomp.js

@@ -251,7 +251,7 @@ function Stomp(args) {
     this.debug = args['debug'];
     this.login = args['login'] || null;
     this.passcode = args['passcode'] || null;
-    this.log = new StompLogging(this.debug);
+    this.log = new stomp_utils.StompLogging(this.debug);
     this._subscribed_to = {};
     this.session = null;
     this.ssl = args['ssl'] ? true : false;