applied changes from Tom Moog #58002 Some cleanup, there is still a memory

applied changes from Tom Moog #58002 Some cleanup, there is still a memory

* libxslt/transform.[ch]: applied changes from Tom Moog #58002
* libexslt/functions.c libxslt/documents.c libxslt/extensions.c:
  Some cleanup, there is still a memory leak left and some warnings
  in libexslt.
Daniel