#793 provide the default '=' and '!=' operators for all types of Computed Fields.

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@2901 a333f486-631f-4898-b8df-5754b55c2be0

core/attributedef.class.inc.php

@@ -4657,7 +4657,7 @@ class AttributeComputedFieldVoid extends AttributeDefinition
 
 	public function GetBasicFilterOperators()
 	{
-		return array();
+		return array("="=>"equals", "!="=>"differs from");
 	}
 	public function GetBasicFilterLooseOperator()
 	{