[xml] Possible xmlTextReaderRead() bug with improper XML

[jwert ilstechnology com]

Hello,

We are using the xmlreader in our application,
and when parsing a char buffer we get an error that says:

Entity: line 1: parser error : Document
is empty
  <logquery />
^

The problem is that the <logquery/>
element has a leading 0x0C character (I know that's a bad thing) but what
surprised me is that xmlTextReaderRead() threw the Document is empty error,
but it still returned ok, and we never exit our "while(xmlTextReaderRead(reader)"
loop.  I would have expected that to throw an error and dump me out.
 If someone gives me a pointer where to look in the xmlreader code,
I'm happy to investigate it, but I'm not too familiar with the inner workings
of libxml2.

Thanks,
Jim