2017-09-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_ch5.adb, freeze.adb, exp_ch4.adb, exp_ch6.adb, lib-xref.adb:
	Minor reformatting.

2017-09-06  Justin Squirek  <squirek@adacore.com>

	* exp_attr.adb (Expand_N_Attribute_Reference): Modified Image
	attribute cases (Rewrite_Object_Reference_Image): Created to
	aid the rewriting of new-style 'Image attributes.
	* sem_attr.adb (Analyze_Attribute): Modified Image attribute cases
	(Check_Object_Reference_Image): Created to handle verification of
	'Image with object-references as prefixes.
	* sem_util.ads, sem_util.adb (Is_Image_Applied_To_Object):
	Create predicate to identify cases where an 'Image attribute's
	prefix applies to an object reference.

From-SVN: r251767