Fix error on generating activity page when there is no activity

James Moger

2013-10-15 e1908933fa9968b11e9ea03d88730aee3140534b

 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");