title: Kaminari pagination scope problem
body: <p>In Kaminari, this works:   </p>
  
  <pre><code>&lt;%= paginate @posts %&gt;
  </code></pre>
  
  <p>But if I do something like:    </p>
  
  <pre><code>&lt;%= paginate @user.posts %&gt;
  </code></pre>
  
  <p>I get</p>
  
  <pre><code>undefined method `current_page' for #&lt;Class:0x58378e0&gt;      
  </code></pre>
  
  <p>How do I fix this? I heard inherited_resources helped, but I don't know how to use it to fix this bug.</p>