2016-06-07  Paolo Carlini  <paolo.carlini@oracle.com>

	* diagnostic.c (diagnostic_impl, diagnostic_n_impl): New.
	(inform, inform_at_rich_loc, inform_n, warning, warning_at,
	warning_at_rich_loc, warning_n, pedwarn, permerror,
	permerror_at_rich_loc, error, error_n, error_at, error_at_rich_loc,
	sorry, fatal_error, internal_error, internal_error_no_backtrace):
	Use the above.

From-SVN: r237168