fdo#78659:FIle geting corrupted after Roundtrip due to fieldchar.

In a hyperlink, the field with fieldchartype="end" is getting addeded eventhough there is no begin for that field.

Change-Id: I50df6efc63fc9a66b146d4a861ae4bd654b4a3c6
Reviewed-on: https://gerrit.libreoffice.org/9368Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/qa/extras/ooxmlexport/ooxmlexport.cxx

@@ -3362,6 +3362,15 @@ DECLARE_OOXMLEXPORT_TEST(testFDO78284, "fdo78284.docx")
                         "image/png");
 }
 
+DECLARE_OOXMLEXPORT_TEST(testFDO78659, "fdo78659.docx")
+{
+    xmlDocPtr pXmlDoc = parseExport("word/document.xml");
+    if (!pXmlDoc)
+        return;
+
+    assertXPath(pXmlDoc, "/w:document[1]/w:body[1]/w:tbl[8]/w:tr[6]/w:tc[1]/w:p[1]/w:hyperlink[1]/w:r[3]/w:fldChar[1]", 0);
+}
+
 DECLARE_OOXMLEXPORT_TEST(testFDO78384,"fdo78384.docx")
 {
     xmlDocPtr pXmlDoc = parseExport("word/document.xml");

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -1866,7 +1866,7 @@ bool DocxAttributeOutput::StartURL( const OUString& rUrl, const OUString& rTarge
 bool DocxAttributeOutput::EndURL()
 {
     m_closeHyperlinkInThisRun = true;
-    if(m_hyperLinkAnchor != "" && m_hyperLinkAnchor.startsWith("_Toc"))
+    if(m_startedHyperlink && m_hyperLinkAnchor != "" && m_hyperLinkAnchor.startsWith("_Toc"))
     {
         m_endPageRef = true;
     }