cp:
	* cp-tree.h (TMPL_ARGS_HAVE_MULTIPLE_LEVELS): non-NULL
	NODE is always a TREE_VEC of non-zero size.
	(NUM_TMPL_ARGS): NODE is always a TREE_VEC.
	* decl2.c (arg_assoc): Template args will be a vec.
	* error.c (dump_decl) <TEMPLATE_ID_EXPR case>: Call
	dump_template_argument_list.
	(dump_template_parms): Args will be a vec.
	* parser.c (cp_parser_template_argument_list): Produce a
	vector, not a list.
	* pt.c (coerce_template_parms): Args are always vectors.
	(mangle_class_name_for_template): Likewise.
	(lookup_template_function): Likewise.
	(lookup_template_class): Likewise.
	(tsubst_template_args): Likewise.
	(tsubst_baselink): Use tsubst_template_args.
	(tsubst_qualified_id): Likewise.
	(tsubst_copy) <TEMPLATE_ID_EXPR case>: Likewise.
	(tsubst_copy_and_build) <TEMPLATE_ID_EXPR case>: Likewise.
	(any_dependent_template_args_p):  Args are always vectors.
	* tree.c (cp_tree_equal): Add TEMPLATE_ID_EXPR case.

From-SVN: r70295