sem_util.adb (Normalize_Actuals): Take into account extra actuals that may have been...

sem_util.adb (Normalize_Actuals): Take into account extra actuals that may have been introduced previously.

2016-05-02  Ed Schonberg  <schonberg@adacore.com>

	* sem_util.adb (Normalize_Actuals): Take into account extra
	actuals that may have been introduced previously. Normally extra
	actuals are introduced when a call is expanded, but a validity
	check may copy and reanalyze a call that carries an extra actual
	(e.g. an accessibility parameter) before the call itself is
	marked Analzyed, and the analysis of the copy has to be able to
	cope with the added actual.

From-SVN: r235723