Issue 1882: Error when installing XE 1.5 with MSSQL

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@10555 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/db/queryparts/expression/UpdateExpressionWithoutArgument.class.php

@@ -35,6 +35,10 @@
 		function getArgument(){
 			return null;
 		}
+		
+		function getArguments(){
+			return array();
+		}
 	}