Correct the XML document handler...

which is used to parse Microsoft Word OOXML documents in case of unknown XML
elements

(cherry picked from commit 22e334845346f4e3189c72e706d744385953af19)

Conflicts:
	writerfilter/source/ooxml/OOXMLDocumentImpl.cxx
	writerfilter/source/ooxml/OOXMLFastDocumentHandler.cxx
	writerfilter/source/ooxml/OOXMLFastDocumentHandler.hxx

Change-Id: Ibcd3e808abfb35291bb04aa10190a7800f0837fa