exp_ch4.adb (Expand_N_Allocator): Code cleanup.

exp_ch4.adb (Expand_N_Allocator): Code cleanup.

2009-04-15  Javier Miranda  <miranda@adacore.com>

	* exp_ch4.adb (Expand_N_Allocator): Code cleanup.

	* sem_ch6.adb (Check_Anonymous_Return): Add missing support for
	functions returning anonymous access to class-wide limited types. Mark
	also the containing scope as a task master.

	* sem_ch8.adb (Restore_Scope_Stack): Add missing management for
	limited-withed packages. Required to restore their visibility after
	processing packages associated with implicit with-clauses.

	* exp_ch3.adb (Build_Class_Wide_Master): Avoid marking masters
	associated with return statements because this work is now done by
	Check_Anonymous_Return.
	(Build_Master): Code cleanup.

From-SVN: r146089