php 8 error. class.mail.inc. line 149. #5 parameter cannot be null.

diff --git a/reporting/includes/class.mail.inc b/reporting/includes/class.mail.inc
index 16cc81c368f7a7b0a69894e10a1a14e77cc554d3..9e426db0ba826bdb6b4e27f602307dc228fa7c07 100644 (file)
--- a/reporting/includes/class.mail.inc
+++ b/reporting/includes/class.mail.inc
@@ -39,7 +39,7 @@ class email
     var $subject = "";
     var $body = "";
        var $charset = 'ISO-8859-1';
-       var $add_params;
+       var $add_params = "";
        
     function __construct($name, $mail)
     {