psalm fix

public/edit.php

@@ -27,6 +27,9 @@ require_once('common.php');
 $username = authentication_get_username(); # enforce login
 
 $table = safepost('table', safeget('table'));
+if(!is_string($table)) {
+    die("Invalid table name given!");
+}
 $handlerclass = ucfirst($table) . 'Handler';
 
 if (!preg_match('/^[a-z]+$/', $table) || !file_exists(dirname(__FILE__) . "/../model/$handlerclass.php")) { # validate $table