Add delete_compiled_templates on plugin update version.

git-svn-id: http://piwigo.org/svn/trunk@8245 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/plugins_update.php

@@ -66,6 +66,9 @@ if (isset($_GET['plugin']) and isset($_GET['revision']))
     {
       $plugins->perform_action('activate', $plugin_id);
     }
+
+    $template->delete_compiled_templates();
+
     redirect($base_url.'&plugin='.$plugin_id.'&upgradestatus='.$upgrade_status);
   }
 }