fixes npe

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193601 13f79535-47bb-0310-9956-ffa450edef68

src/org/apache/fop/layout/ForeignObjectArea.java

@@ -71,7 +71,8 @@ public class ForeignObjectArea extends Area {
     }
 
     public void render(Renderer renderer) {
-	renderer.renderForeignObjectArea(this);
+	if(foreignObject != null)
+		renderer.renderForeignObjectArea(this);
     }
 
     public void setObject(Area fobject) {