title: Magento pull image with attribute in upsell.phtml
body: <p>I have the image attribute 'upsell_gif' applied to my gif that should be only visible in the upsell box. </p>
  
  <p>When I change in the upsell.php</p>
  
  <pre><code>&lt;?php echo $this-&gt;helper('catalog/image')-&gt;init($_link, 'small_image')-&gt;resize(125) ?&gt;
  </code></pre>
  
  <p>to</p>
  
  <pre><code>&lt;?php echo $this-&gt;helper('catalog/image')-&gt;init($_link, 'upsell_gif')-&gt;resize(125) ?&gt;
  </code></pre>
  
  <p>I get an error. Why? I can call the image with</p>
  
  <pre><code>&lt;img src="&lt;?php echo $this-&gt;helper('catalog/image')-&gt;init($_product, 'upsell_gif')-&gt;resize(150, 150); ?&gt;" /&gt;
  </code></pre>
  
  <p>in the view.phtml perfectly..</p>