fdo#79062 File having Footnote with Text Effect got corrupted after RT

When we do the export of the file, In the footnotes.xml,
 the w14 namespaces were not being added.

This issue exists for EndNotes as well.

Change-Id: I6494bbf1beaa0666743d9c1bb85a64f8bda20398
Reviewed-on: https://gerrit.libreoffice.org/9439Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/qa/extras/ooxmlexport/ooxmlexport.cxx

@@ -3512,6 +3512,19 @@ DECLARE_OOXMLEXPORT_TEST(testFdo78910, "fdo78910.docx")
     assertXPath ( pXmlDoc, "//w:hyperlink[2]/w:r[5]/w:fldChar", "fldCharType", "end" );
 }
 
+DECLARE_OOXMLEXPORT_TEST(testFDO79062, "fdo79062.docx")
+{
+    xmlDocPtr pXmlFootNotes = parseExport("word/footnotes.xml");
+    if (!pXmlFootNotes)
+        return;
+    assertXPath(pXmlFootNotes, "/w:footnotes", "Ignorable", "w14 wp14");
+
+    xmlDocPtr pXmlEndNotes = parseExport("word/endnotes.xml");
+    if (!pXmlEndNotes)
+        return;
+    assertXPath(pXmlEndNotes, "/w:endnotes", "Ignorable", "w14 wp14");
+}
+
 DECLARE_OOXMLEXPORT_TEST(testFdo78957, "fdo78957.docx")
 {
     xmlDocPtr pXmlHeader = parseExport("word/header2.xml");

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -6040,10 +6040,7 @@ void DocxAttributeOutput::FootnotesEndnotes( bool bFootnotes )
     sal_Int32 nBody = bFootnotes? XML_footnotes: XML_endnotes;
     sal_Int32 nItem = bFootnotes? XML_footnote:  XML_endnote;
 
-    m_pSerializer->startElementNS( XML_w, nBody,
-            FSNS( XML_xmlns, XML_w ), "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
-            FSNS( XML_xmlns, XML_r ), "http://schemas.openxmlformats.org/officeDocument/2006/relationships",
-            FSEND );
+    m_pSerializer->startElementNS( XML_w, nBody, m_rExport.MainXmlNamespaces(m_pSerializer) );
 
     sal_Int32 nIndex = 0;
 

sw/source/filter/ww8/docxexport.hxx

@@ -246,9 +246,6 @@ private:
     /// Write word/embeddings/Worksheet[n].xlsx
     void WriteEmbeddings();
 
-    /// All xml namespaces to be used at the top of any text .xml file (main doc, headers, footers,...)
-    sax_fastparser::XFastAttributeListRef MainXmlNamespaces( sax_fastparser::FSHelperPtr serializer );
-
     /// Get background color of the document, if there is one.
     boost::optional<const SvxBrushItem*> getBackground();
 
@@ -256,6 +253,9 @@ private:
     bool isMirroredMargin();
 
 public:
+    /// All xml namespaces to be used at the top of any text .xml file (main doc, headers, footers,...)
+    sax_fastparser::XFastAttributeListRef MainXmlNamespaces( sax_fastparser::FSHelperPtr serializer );
+
     /// FIXME this is temporary, remotely reminding the method of the same
     /// name in WW8Export.
     void WriteMainText();