tried to fix #102800 for good. Reenabled memory debug checking which got

* xsltproc/xsltproc.c: tried to fix #102800 for good. Reenabled
  memory debug checking which got deactivated at some point ?!?
* libexslt/date.c libxslt/attributes.c: fixing some memory leaks
* libxslt/xsltutils.c: very small change on HTML indentation handling
Daniel