incomplete steps for real/double support avoiding a compilation problem

* xmlschemastypes.c: incomplete steps for real/double support
* testAutomata.c include/libxml/xmlautomata.h
  include/libxml/xmlregexp.h: avoiding a compilation problem
* valid.c include/libxml/valid.h: starting the work toward using
  the regexps for actual DTD validation
Daniel
7 files changed