decl.c (gnat_to_gnu_component_type): Force at least unit size for the component size of an array with aliased components.

	* gcc-interface/decl.c (gnat_to_gnu_component_type): Force at least
	unit size for the component size of an array with aliased components.
	(maybe_pad_type): Do not warn for MAX_EXPR.

From-SVN: r152417