2006-05-06  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpparamspecs.[ch]: added "gboolean none_ok" members
	to GimpParamSpecImageID, GimpParamSpecItemID and
	GimpParamSpecDisplayID.  If none_ok is set, allow '0' and '-1' as
	valid IDs. Added "none_ok" parameter to all ID param spec
	constructors.

	* app/pdb/gimp-pdb-compat.c: set none_ok to TRUE in all compat
	param specs, so only IDs that are really random garbage don't pass
	validation. Fixes validation errors with 0 and -1 IDs.

	* tools/pdbgen/app.pl: set none_ok to FALSE by default. Added
	support for $arg->{none_ok} to control it.

	* tools/pdbgen/pdb/image.pdb
	* tools/pdbgen/pdb/progress.pdb
	* tools/pdbgen/pdb/text_tool.pdb: use none_ok instead of
	no_success (which disables validation entirely).

	* app/pdb/[many]_cmds.c: regenerated.