Bug: 500 when transfer repository to collaborator

templates/.VERSION

@@ -1 +1 @@
-0.5.4.0928 Beta
+0.5.4.0929 Beta

templates/repo/sidebar.tmpl

@@ -20,9 +20,11 @@
         <!-- <li>
             <a class="radius" href="#"><i class="octicon octicon-organization"></i>contributors <span class="num right label label-gray label-radius">43</span></a>
         </li> -->
+        {{if .IsRepositoryTrueOwner}}
         <li class="border-bottom"></li>
         <li>
             <a class="radius" href="{{.RepoLink}}/settings"><i class="octicon octicon-tools"></i>{{.i18n.Tr "repo.settings"}}</a>
         </li>
+        {{end}}
     </ul>
 </div>