* cplus-dem.c (work_stuff): Replace const_type and volatile_type
	with type_quals.
	(TYPE_UNQUALIFIED): New macro.
	(TYPE_QUAL_CONST): Likewise.
	(TYPE_QUAL_VOLATILE): Likewise.
	(TYPE_QUAL_RESTRICT): Likewise.
	(code_for_qualifier): New function.
	(qualifier_string): Likewise.
	(demangle_qualifier): Likewise.
	(internal_cplus_demangle): Use them.
	(demangle_signature): Likewise.
	(demangle_template_value_parm): Likewise.
	(do_type): Likewise.
	(demangle_fund_type)): Likewise.

From-SVN: r23260