Ooops - no xml:lang language output in to XML serializer

$ pwd
/devel/WWW/2000/10/swap/test
$ time cwm --pipe *.rdf  > /dev/null
Traceback (most recent call last):
   File "/devel/WWW/2000/10/swap/cwm.py", line 650, in ?
     doCommand()
   File "/devel/WWW/2000/10/swap/cwm.py", line 426, in doCommand
     referer="")
   File "/devel/WWW/2000/10/swap/webAccess.py", line 152, in load
     p.feed(buffer)
   File "/devel/WWW/2000/10/swap/sax2rdf.py", line 643, in feed
     self._p.feed(data)
   File "/sw/lib/python2.2/xml/sax/expatreader.py", line 144, in feed
     self._parser.Parse(data, isFinal)
   File "/sw/lib/python2.2/xml/sax/expatreader.py", line 273, in 
end_element_ns
     self._cont_handler.endElementNS(pair, qname)
   File "/devel/WWW/2000/10/swap/sax2rdf.py", line 563, in endElementNS
     obj = self.sink.newLiteral(buf, self._datatype, lang)
   File "/devel/WWW/2000/10/swap/RDFSink.py", line 262, in newLiteral
     if lang != None: raise ValueError("This sink cannot accept values 
with languages")
ValueError: This sink cannot accept values with languages

real    0m1.615s
user    0m0.750s
sys     0m0.210s