title: SpUtility.GetGenericSetupPath returns null
body: <p>The following code snippet is expected to return the hive path for SharePoint (..\Microsoft Shared\Web Server Extensions\14), instead it returns null.</p>
  
  <pre><code>using Microsoft.SharePoint.Utilities;
  string featurePath = SPUtility.GetGenericSetupPath(string.Empty);
  </code></pre>
  
  <p>What am I missing?</p>