fixed to not send NULL to %s printing cleaning up some of the regression

* HTMLparser.c: fixed to not send NULL to %s printing
* python/tests/error.py result/HTML/doc3.htm.err
  result/HTML/test3.html.err result/HTML/wired.html.err
  result/valid/t8.xml.err result/valid/t8a.xml.err: cleaning
  up some of the regression tests error
Daniel
8 files changed