- Fix setting refresh_interval to "Never" in Preferences (#1489286)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix setting refresh_interval to "Never" in Preferences (#1489286)
 - Fix replacement variables in user-specific base_dn in some LDAP requests (#1489279)
 - Fix image scaling issues when image has only one dimension smaller than the limit (#1489274)
 - Fix issue where uploaded photo was lost when contact form did not validate (#1489274)

program/steps/settings/save_prefs.inc

@@ -160,7 +160,7 @@ switch ($CURR_SECTION)
 
     $a_user_prefs['timezone'] = (string) $a_user_prefs['timezone'];
 
-    if (isset($a_user_prefs['refresh_interval']) && !empty($CONFIG['min_refresh_interval'])) {
+    if (!empty($a_user_prefs['refresh_interval']) && !empty($CONFIG['min_refresh_interval'])) {
       if ($a_user_prefs['refresh_interval'] < $CONFIG['min_refresh_interval']) {
         $a_user_prefs['refresh_interval'] = $CONFIG['min_refresh_interval'];
       }