[XFA] Set default max value in occur tag to -1 (bug 1998843)

src/core/xfa/template.js

@@ -3899,7 +3899,7 @@ class Occur extends XFAObject {
       attributes.max !== ""
         ? getInteger({
             data: attributes.max,
-            defaultValue: 1,
+            defaultValue: -1,
             validate: x => true,
           })
         : "";

test/pdfs/xfa_bug1998843.pdf.link

@@ -0,0 +1 @@
+https://bugzilla.mozilla.org/attachment.cgi?id=9525217

test/test_manifest.json

@@ -13067,5 +13067,15 @@
     "type": "extract",
     "includePages": [0],
     "pageMapping": { "1": 1 }
+  },
+  {
+    "id": "xfa_bug1998843",
+    "file": "pdfs/xfa_bug1998843.pdf",
+    "md5": "b7b25e5b05b2b903d0a6727c9f962a91",
+    "link": true,
+    "rounds": 1,
+    "enableXfa": true,
+    "lastPage": 1,
+    "type": "eq"
   }
 ]