test: don't create root element in startDocument() in xmlwriter

Change-Id: Ia08e9f8caf2a2fb42855dcb2245e013e1a181216

include/test/xmlwriter.hxx

@@ -25,7 +25,7 @@ public:
     XmlWriter(xmlTextWriterPtr pWriter);
     virtual ~XmlWriter();
 
-    void startDocument(const OString& sTagName);
+    void startDocument();
     void endDocument();
 
     void element(const OString& sTagName);

test/source/mtfxmldump.cxx

@@ -168,7 +168,8 @@ void MetafileXmlDump::dump(GDIMetaFile& rMetaFile)
     xmlTextWriterSetIndent( xmlWriter, 1 );
 
     XmlWriter aWriter(xmlWriter);
-    aWriter.startDocument("metafile");
+    aWriter.startDocument();
+    aWriter.startElement("metafile");
 
     for(MetaAction* pAction = rMetaFile.FirstAction(); pAction != NULL; pAction = rMetaFile.NextAction())
     {
@@ -391,12 +392,9 @@ void MetafileXmlDump::dump(GDIMetaFile& rMetaFile)
 
         }
     }
-    aWriter.endDocument();
 
-    for(size_t i=0; i<usedIds.size(); ++i)
-        if(usedIds[i])
-            printf("%ld ", i);
-    printf("\n");
+    aWriter.endElement();
+    aWriter.endDocument();
 
     mrStream.WriteOString(aString.makeStringAndClear());
 }

test/source/xmlwriter.cxx

@@ -27,10 +27,9 @@ XmlWriter::XmlWriter(xmlTextWriterPtr pWriter) :
 XmlWriter::~XmlWriter()
 {}
 
-void XmlWriter::startDocument(const OString& name)
+void XmlWriter::startDocument()
 {
     xmlTextWriterStartDocument(mpWriter, NULL, NULL, NULL);
-    startElement(name);
 }
 
 void XmlWriter::endDocument()