fdo#78885 : File crashed while opening in LO

  - File attached to issue contains footnote between a table and reference
    of footnote is in field.
  - In PopFieldContext code was throwing exception due to null value of
    footnotestartnode.

Reviewed on:
	https://gerrit.libreoffice.org/9697

Change-Id: I467e234a7daa6a5f724087c2cc959e4c9d76f4d2

writerfilter/source/dmapper/DomainMapper_Impl.cxx

@@ -1552,7 +1552,7 @@ void DomainMapper_Impl::PushFootOrEndnote( bool bIsFootnote )
         }
         appendTextContent( uno::Reference< text::XTextContent >( xFootnoteText, uno::UNO_QUERY_THROW ), aFontProperties );
         m_aTextAppendStack.push(TextAppendContext(uno::Reference< text::XTextAppend >( xFootnoteText, uno::UNO_QUERY_THROW ),
-                    m_bIsNewDoc ? uno::Reference<text::XTextCursor>() : xFootnoteText->createTextCursorByRange(xFootnoteText->getStart())));
+                    xFootnoteText->createTextCursorByRange(xFootnoteText->getStart())));
 
         // Redlines for the footnote anchor
         CheckRedline( xFootnote->getAnchor( ) );