Merge pull request 'Fix PHP8 empty param warning' (#79) from powerivq/tt-rss:php8compat into master

Reviewed-on: https://dev.tt-rss.org/fox/tt-rss/pulls/79

1 files changed, 1 insertions, 1 deletions

diff --git a/classes/api.php b/classes/api.php
index 0e873856f..85dc5d0db 100755
--- a/classes/api.php
+++ b/classes/api.php
@@ -835,7 +835,7 @@ class API extends Handler {
 	}
 
 	function getFeedTree(): bool {
-		$include_empty = self::_param_to_bool(clean($_REQUEST['include_empty']));
+		$include_empty = self::_param_to_bool($_REQUEST['include_empty'] ?? false);
 
 		$pf = new Pref_Feeds($_REQUEST);