bug fix for Deferred.prototype.toObservable

Author: kae

lib/rx.jquery.js

@@ -26,7 +26,7 @@
 
     $.Deferred.prototype.toObservable = function () {
         var subject = new asyncSubject();
-        parent.done(function () {
+        this.done(function () {
             subject.onNext(slice.call(arguments));
             subject.onCompleted();
         }).fail(function () {