Bug chasing and fixing ...:

- libxslt/preproc.c libxslt/transform.c: a couple of nastyness
  w.r.t. value of tree result (and attributes within it) fixed.
- tests/xmlspec/Makefile.am tests/xmlspec/REC-xml-20001006.html:
  Integrated the xmlspec to the test (i.e. diffed output for
  changes).
Daniel