Typing IHandler methods, typing Handler_Public, fix type of $feed_id (might be tag).

classes/handler/protected.php

@@ -1,7 +1,7 @@
 <?php
 class Handler_Protected extends Handler {
 
-	function before($method) {
+	function before(string $method): bool {
 		return parent::before($method) && !empty($_SESSION['uid']);
 	}
 }