FOP-2581: NumberFormatException when page-sequence format can't be parsed as an Integer; fix by Alexios Giotis

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1732903 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/intermediate/IFParser.java

@@ -523,7 +523,7 @@ public class IFParser implements IFConstants {
                 establishForeignAttributes(foreignAttributes);
                 documentHandler.startPage(index, name, pageMasterName,
                         new Dimension(width, height));
-                documentHandler.getContext().setPageNumber(Integer.parseInt(name));
+                documentHandler.getContext().setPageNumber(index + 1);
                 resetForeignAttributes();
             }