title: LiipImagineBundle: Redirection to login instead of showing image
body: <p>I habe the following problem: if an image isn't in the cache, liip imagine redirects to the fosuserbundle/login page. I just can't find wrong configuration...</p>
  
  <pre><code>liip_imagine:
  resolvers:
  default:
  web_path: ~
  
  filter_sets:
      cache: ~
      list_item:
          quality: 75
          filters:
              relative_resize: { widen: 164 }`
  
  _liip_imagine: prefix: /images/rs/ resource: "@LiipImagineBundle/Resources/config/routing.xml"
  </code></pre>
  
  <p>any ideas? thanks!</p>