Internal: Changed way AttributeLinkedSet check if two ormLinkSet are equal.

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@4939 a333f486-631f-4898-b8df-5754b55c2be0

core/attributedef.class.inc.php

@@ -1355,7 +1355,7 @@ class AttributeLinkedSet extends AttributeDefinition
 		}
 		else
 		{
-			$bAreEquivalent = $val1->Equals($val2);
+            $bAreEquivalent = ($val2->HasDelta() === false);
 		}
 		return $bAreEquivalent;
 	}