Bug #5913 sendmail: reports that there is no 'TO' given - but it is.

extension/qfq/qfq/report/SendMail.php

@@ -52,7 +52,7 @@ class SendMail {
 
         $redirectAllMail = $this->store->getVar(SYSTEM_REDIRECT_ALL_MAIL_TO, STORE_SYSTEM);
 
-        if ($redirectAllMail !== false) {
+        if (!empty($redirectAllMail)) {
             $addBody = "All QFQ outgoing mails are catched and redirected to you." . PHP_EOL . "Original receiver:" . PHP_EOL;
             $addBody .= 'TO: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER] . PHP_EOL;
             $addBody .= 'CC: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER_CC] . PHP_EOL;