* jcf-io.c (open_class):  Set filename field.

	* jcf-parse,c (parse_class_file):  Set current_function_decl
	for better error message when Code attribute is missing.

	* lang.c (put_decl_node, lang_print_error):  Re-arrange for
	better diagnostics, especially for constructors.

From-SVN: r45299