crashtesting: assert on re-exporting ooo25141-1.doc to doc

since...

commit e0b41fcb56e51f20684da4ba44d7ed6e0e1a3234
Date:   Thu Oct 28 13:36:50 2021 +0300

    tdf#144668: docx export: simpler way to create lvlText in numberings

Change-Id: I40b3cdf5e15d3a4dacc50bd46a5bbca84e6fac03
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/124822
Tested-by: Jenkins
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/sw/source/filter/ww8/wrtw8num.cxx b/sw/source/filter/ww8/wrtw8num.cxx
index bb61901..8570078 100644
--- a/sw/source/filter/ww8/wrtw8num.cxx
+++ b/sw/source/filter/ww8/wrtw8num.cxx
@@ -473,7 +473,8 @@ void MSWordExportBase::NumberingLevel(
    else
    {
        // Create level string
        if (SVX_NUM_NUMBER_NONE != rFormat.GetNumberingType())
        if (SVX_NUM_NUMBER_NONE != rFormat.GetNumberingType() &&
            rFormat.HasListFormat())
        {
            sal_uInt8* pLvlPos = aNumLvlPos;
            sNumStr = rFormat.GetListFormat();