Fix for NPE when the AWT Viewer is used with an area tree file as input.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@371919 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 3 insertions, 1 deletions

diff --git a/src/java/org/apache/fop/area/PageViewport.java b/src/java/org/apache/fop/area/PageViewport.java
index 51c354b4d..88a52dc7a 100644
--- a/src/java/org/apache/fop/area/PageViewport.java
+++ b/src/java/org/apache/fop/area/PageViewport.java
@@ -105,7 +105,9 @@ public class PageViewport implements Resolvable, Cloneable {
      * @param original the original PageViewport to copy from
      */
     public PageViewport(PageViewport original) {
-        this.extensionAttachments = new java.util.ArrayList(original.extensionAttachments);
+        if (original.extensionAttachments != null) {
+            this.extensionAttachments = new java.util.ArrayList(original.extensionAttachments);
+        }
         this.pageNumber = original.pageNumber;
         this.pageNumberString = original.pageNumberString;
         this.page = (Page)original.page.clone();