Bug 66425: Avoid exceptions found via poi-fuzz

Fix one expected exception-text which is different
on newer Java versions

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=63266

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1913383 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/main/java/org/apache/poi/xssf/usermodel/XSSFTextParagraph.java

@@ -836,7 +836,7 @@ public class XSSFTextParagraph implements Iterable<XSSFTextRun>{
     public ListAutoNumber getBulletAutoNumberScheme() {
         ParagraphPropertyFetcher<ListAutoNumber> fetcher = new ParagraphPropertyFetcher<ListAutoNumber>(getLevel()){
             public boolean fetch(CTTextParagraphProperties props){
-                if(props.isSetBuAutoNum()) {
+                if(props.isSetBuAutoNum() && props.getBuAutoNum().getType() != null) {
                     setValue(ListAutoNumber.values()[props.getBuAutoNum().getType().intValue() - 1]);
                     return true;
                 }