Merge pull request 'isLoggedIn adds a message to the system log when it returns false, fix for php8+' (#106) from rodneys_mission/tt-rss:master into master

Reviewed-on: https://gitea.tt-rss.org/tt-rss/tt-rss/pulls/106

classes/api.php

@@ -99,7 +99,7 @@ class API extends Handler {
 	}
 
 	function isLoggedIn(): bool {
-		return $this->_wrap(self::STATUS_OK, array("status" => $_SESSION["uid"] != ''));
+		return $this->_wrap(self::STATUS_OK, array("status" => (bool)($_SESSION["uid"] ?? '')));
 	}
 
 	function getUnread(): bool {