re PR c++/9849 (Missing keyword 'template' produces ICE with no diagnostic on 3.3 (and unreadable diagnostic on 3.4))

	PR c++/9849
	* g++.dg/template/error4.C: New test.
	* g++.dg/template/nested3.C: Adjust error markers.

	PR c++/9849
	* parser.c (cp_lexer_prev_token): New function.
	(cp_parser_skip_to_closing_parenthesis): Add consume_paren
	parameter.
	(cp_parser_nested_name_specifier_opt): Add is_declaration
	parameter.
	(cp_parser_nested_name_specifier): Likewise.
	(cp_parser_class_or_namespace_name): Likewise.
	(cp_parser_class_name): Likewise.
	(cp_parser_template_id): Likewise.
	(cp_parser_template_name): Likewise.
	(cp_parser_id_expression): Adjust calls to
	cp_parser_nested_name_specifier_op, cp_parser_template_id,
	cp_parser_class_name.
	(cp_parser_unqualified_id): Likewise.
	(cp_parser_postfix_expression): Likewise.
	(cp_parser_pseudo_destructor_name): Likewise.
	(cp_parser_cast_expression): Likewise.
	(cp_parser_mem_initializer_id): Likewise.
	(cp_parser_simple_type_specifier): Likewise.
	(cp_parser_type_name): Likewise.
	(cp_parser_elaborated_type_specifier): Likewise.
	(cp_parser_qualified_namespace_specifier): Likewise.
	(cp_parser_using_declaration): Likewise.
	(cp_parser_using_directive): Likewise.
	(cp_parser_ptr_operator): Likewise.
	(cp_parser_declarator_id): Likewise.
	(cp_parser_class_head): Likewise.
	(cp_parser_base_specifier): Likewise.
	(cp_parser_constructor_declarator_p): Likewise.
	(cp_parser_direct_declarator): Fix typo in comment.
	(cp_parser_parenthesized_expression_list): Adjust call to
	cp_parser_skip_to_closing_parenthesis.
	(cp_parser_selection_statement): Likewise.

From-SVN: r74087