block loading include files directly

inc/user.php

@@ -1,4 +1,10 @@
 <?php
+	if($_SERVER['SCRIPT_FILENAME'] == str_replace('\\', '/', __FILE__)) {
+		// You cannot request this file directly.
+		header('Location: ../', true, 302);
+		exit;
+	}
+	
 	// 'false' means that the user is not logged in as a moderator
 	$mod = false;