Added logging for empty group sync.

Alfred Schmid

2014-02-03 03c0191b65c68dc6be3da0e0056bcb3cbc6e9cef

 src/main/java/com/gitblit/wicket/ExternalImage.java

@@ -27,6 +27,7 @@
      super(id, new Model<String>(url));

   }



   @Override

   protected void onComponentTag(ComponentTag tag) {

      super.onComponentTag(tag);

      checkComponentTag(tag, "img");