sem_ch4.adb (Analyze_Selected_Component): Create Actual_Subtype even with expansion...

sem_ch4.adb (Analyze_Selected_Component): Create Actual_Subtype even with expansion disabled.

	* sem_ch4.adb (Analyze_Selected_Component): Create Actual_Subtype even
	with expansion disabled. The actual subtype is needed among other
	places when the selected component appears in the context of a loop
	bound, and denotes a packed array.
	(Operator_Check): Always use the first subtype in the
	error message, to avoid the appearance of internal base types.
	(Transform_Object_Operation): Copy each actual in full
	to the parameter associations of the constructed call, rather than
	using the shallow copy mechanism of New_Copy_List. This ensures that
	the chaining of named associations is done properly.
	(Complete_Object_Operation): Rewrite node, rather than
	replacing it, so that we can trace back to the original selected
	component.

	* sem_elab.adb (Set_Elaboration_Constraint): For initialization calls,
	and calls that use object notation, if the called function is not
	declared  in a withed unit, place the elaboration constraint on the
	unit in the context that makes the function accessible.
	(Check_Elab_Subtype_Declaration): Check whether a subtype declaration
	imposes an elaboration constraint between two packages.

From-SVN: r94820