2013-10-18  Richard Biener  <rguenther@suse.de>

	* stor-layout.c (layout_type): Do not change TYPE_PRECISION
	or TYPE_UNSIGNED of integral types.
	(set_min_and_max_values_for_integral_type): Leave TYPE_MIN/MAX_VALUE
	NULL_TREE for zero-precision integral types.

From-SVN: r203813