Output clip trait for BlockViewports

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@198292 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/xml/XMLRenderer.java

@@ -471,6 +471,9 @@ public class XMLRenderer extends AbstractRenderer {
                 addAttribute("top-position", bvp.getYOffset());
             }
             addAttribute("ctm", bvp.getCTM().toString());
+            if (bvp.getClip()) {
+                addAttribute("clipped", "true");
+            }
         } else {
             if (block.getPositioning() == Block.RELATIVE) {
                 addAttribute("positioning", "relative");