* libxslt/xslt.c libxslt/xsltInternals.h libxslt/transform.c
	  libxslt/extra.[ch] libxslt/extensions.c libxslt/preproc.[ch]:
	  fixed compilation warnings due to recent changes to the extension
	  framework.
	* libxslt/preproc.[ch] libexslt/common.c
	  fixed the precomputation of *:document elements
	* libxslt/functions.h: fixed a compilation warning