Avoid NPE if no images are used in the document.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@513865 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 6 insertions, 0 deletions

diff --git a/src/java/org/apache/fop/render/ps/ResourceHandler.java b/src/java/org/apache/fop/render/ps/ResourceHandler.java
index 7d68092bf..f187e619a 100644
--- a/src/java/org/apache/fop/render/ps/ResourceHandler.java
+++ b/src/java/org/apache/fop/render/ps/ResourceHandler.java
@@ -179,6 +179,9 @@ public class ResourceHandler implements DSCParserConstants {
 
     private static void registerSuppliedForms(ResourceTracker resTracker, Map formResources)
             throws IOException {
+        if (formResources == null) {
+            return;
+        }
         Iterator iter = formResources.values().iterator();
         while (iter.hasNext()) {
             PSImageFormResource form = (PSImageFormResource)iter.next();
@@ -188,6 +191,9 @@ public class ResourceHandler implements DSCParserConstants {
 
     private static void generateForms(ResourceTracker resTracker, FOUserAgent userAgent, 
             Map formResources, PSGenerator gen) throws IOException {
+        if (formResources == null) {
+            return;
+        }
         Iterator iter = formResources.values().iterator();
         while (iter.hasNext()) {
             PSImageFormResource form = (PSImageFormResource)iter.next();