Jonas Jenwald ee56dc7719 Ignore Annotations with fieldValue = null when saving (issue 21582)
Some Annotations, e.g. `SignatureWidgetAnnotation`, set `fieldValue = null` which may causing saving to fail during `writeXFADataForAcroform`, hence we simply ignore any such Annotation-data during saving.
2026-07-19 23:00:31 +02:00
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