title: ExtJS 5 requests file with empty name /.js
body: <p>I've made a fresh workspace with the latest sencha cmd 5.0.2.270 and latest ExtJS 5.0.1. Generated an app into in. Wrote a little bit of code.</p>
  
  <p>I generate production build with sencha app build.</p>
  
  <p>The development loads well, but the production build tries to load file with no name and gets a 404</p>
  
  <p>GET <a href="http://yassa-built.dev/.js?_dc=1410352524548">http://yassa-built.dev/.js?_dc=1410352524548</a> 404 (Not Found) 
  After that error it doesn't load at all.</p>
  
  <p>I can't understand what it is searching for. Development is not complaining at all. </p>
  
  <p>I made an archive with it <a href="https://mega.co.nz/#!Dk0gDRJD!dNITsq1fGFs5T4d-4yYFnA6_K6EcAhFkxoeEjaJu7MY">https://mega.co.nz/#!Dk0gDRJD!dNITsq1fGFs5T4d-4yYFnA6_K6EcAhFkxoeEjaJu7MY</a> (~600kb). It includes the sources and the production build. </p>
  
  <p><strong>UPD</strong>
  I've found the place where it starts to break. In file RadioAdminController.js.</p>
  
  <pre><code> case 'menu_referals':
      return app.setSubView('redmed-radioapp-referals', {
        store: Ext.create('RedmedAdmin.store.Referals')
      });
  </code></pre>
  
  <p>If I do not create a store - it works. The production build is ok. The store is nothing special:</p>
  
  <pre><code>Ext.define('RedmedAdmin.store.Referals', {
    extend: 'Ext.data.Store',
    model: 'RedmedAdmin.model.Referal',
    autoLoad: false,
    autoSync: true
  });
  </code></pre>