fix assert on re-export of fdo72640-6.docx to docx

and hopefully loads more

Change-Id: I04f9f757378e25191d7334bd52e418cf84bdf887

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -6009,6 +6009,8 @@ void DocxAttributeOutput::NumberingLevel( sal_uInt8 nLevel,
         }
         m_rExport.OutputItemSet( *pOutSet, false, true, i18n::ScriptType::LATIN, m_rExport.mbExportModeRTF );
 
+        WriteCollectedRunProperties();
+
         m_pSerializer->endElementNS( XML_w, XML_rPr );
     }