2010-06-22  Javier Miranda  <miranda@adacore.com>

	* sem_prag.adb, sem_util.adb, sem_util.ads, sem_attr.adb, exp_ch6.adb,
	exp_disp.adb, sem_eval.adb, exp_dist.adb lib-xref.adb: Code cleanup,
	this patch replaces duplication of code that traverses the chain of
	aliased primitives by a call to routine Ultimate_Alias that
	provides this functionality.

From-SVN: r161184