Fix for #1031 to display error message

Paul Martin

2016-03-26 932e93f555b0740a449350db6125ad52a4b395c8

 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");