decl.c (gnat_to_gnu_component_type): Apply the check for atomic access once the component size is taken into account...

	* gcc-interface/decl.c (gnat_to_gnu_component_type): Apply the check
	for atomic access once the component size is taken into account and
	also do it if the component type is Atomic or Volatile_Full_Access.

From-SVN: r256465