Fix visibility warning

lib/db.php

@@ -207,7 +207,7 @@ abstract class Db {
 		return $result;
 	}
 	
-	protected function __call($name, $arguments){
+	public function __call($name, $arguments){
 		if (substr($name, 0, 3) === 'get'){
 			$requestedProperty = substr($name, 3);
 			$property = strtolower(preg_replace('/(.)([A-Z])/', "$1_$2", $requestedProperty));