fix for images on compare alders page

chicago/templates/compare_council_members.html

@@ -32,7 +32,7 @@ <h1>Compare Alders</h1>
                 <tr id="polygon-{{post.label | slugify}}">
                   <td>
                     <div class="thumbnail-square">
-                      <img src='{{person.manual_headshot}}' alt='{{person.name}}' title='{{person.name}}' class='img-responsive' />
+                      <img src='{{person|get_person_headshot}}' alt='{{person.name}}' title='{{person.name}}' class='img-responsive' />
                     </div>
                   </td>
                   <td>