tree.c (copy_template_template_parm): Use permanent_obstack.

tree.c (copy_template_template_parm): Use permanent_obstack.

	* tree.c (copy_template_template_parm): Use permanent_obstack.
        * pt.c (unify): Remove restrictions on deduction of argument
        of template template parameters.
	* rtti.c (build_dynamic_cast_1): Resolve OFFSET_REF exprs.
	* class.c (resolve_address_of_overloaded_function): Show list of
	all candidates, when none of them match.

From-SVN: r24749