Query cache file - added condition to skip null arguments that do not need validation and are not mandatory.

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@9066 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/db/queryparts/condition/Condition.class.php

@@ -11,7 +11,6 @@
                 var $_show;
                 var $_value_to_string;
 
-
 		function Condition($column_name, $argument, $operation, $pipe){
 			$this->column_name = $column_name;
 			$this->argument = $argument;