Use clear error message when objectExists() method can't be used.

git-svn-id: http://voip.null.ro/svn/ansql/trunk@195 dbfed7de-b0aa-0410-b6a1-c7e608b77fc9

framework.php

@@ -1769,7 +1769,7 @@ public function objectExists($id_name = NULL, $columns_with_default=array())
 		$class = get_class($this);
 		if(!$id_name || !$this->variable($id_name))
 		{
-			Debug::trigger_report('critical',"$id_name "._("is not a defined variable inside the")." $class "._("object."));
+			Debug::trigger_report('critical',_("Class")." $class "._("doesn't have an id. You can't use method objectExists."));
 			exit();
 		}