(crashreport) PHP Warning: Illegal string offset 'rule' in...

(crashreport) PHP Warning:  Illegal string offset 'rule' in /usr/local/www/diag_logs_filter.php on line 277

(cherry picked from commit 64f3742f)
(cherry picked from commit 8f243538)

src/www/diag_logs_filter.php

@@ -274,7 +274,7 @@ function easyrule_pass_rule_add($int, $proto, $srchost, $dsthost, $dstport, $ipp
     global $config;
 
     /* No rules, start a new array */
-    if (!is_array($config['filter']['rule'])) {
+    if (!isset($config['filter']['rule'])) {
         $config['filter']['rule'] = array();
     }