sem_ch6.adb (Set_Formal_Mode): If the subtype has a non_null indicator,...

sem_ch6.adb (Set_Formal_Mode): If the subtype has a non_null indicator, indicate that the formal can never be null.

2005-03-29  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch6.adb (Set_Formal_Mode): If the subtype has a non_null
	indicator, indicate that the formal can never be null.
	(Process_Formals): If a formal has a non_null indicator, insert the
	resulting subtype immediately before the enclosing subprogram decl,
	and not at the beginning of the corresponding declarative part, to
	prevent access before elaboration (Ada2005).

From-SVN: r97185