2019-12-12  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_type.adb (Find_Unique_Type): A call to the universal
	access equality operator requires one operand to be a universal
	access, and the other to be an access type. There is no
	requirement, as previously implied by this routine, that
	pool-specific access types were illegal in this context.

From-SVN: r279304