title: Null object comparison in Mockjax causing exception in jQuery
body: <p>I am attempting to send back stub data via the Mockjax library.  The practice is working out for the most part with one exception: the library fails when it tries to do a <i>null</i> comparison of the live and mock data.  The Mockjax code is below, the data being sent in is the same as the data in the code snippet. </p>
  
  <p>The error occurs in jQuery (line 630 in my file) when it attempts to find the length of a null object inside of $.each.  The version of Mockjax is 1.5.2, the version of jQuery is 1.7.1.</p>
  
  <pre><code>    $.mockjax({
          url: "service/endpoint",
          data: {
              elementId : "207710",
              floorId : null
          },
          responseTime: 0,
          proxy: '../../07-29-13-all-true.json'
      });
  </code></pre>
  
  <p>Has anyone encountered this and what was your solution?  I send <i>null</i> in multiple service calls, so changing that code isn't a great solution at the time.  </p>
  
  <p>Any suggestion would be helpful.</p>