Fix bug where base_dn setting was ignored inside group_filters (#5720)

CHANGELOG

@@ -30,6 +30,7 @@ CHANGELOG Roundcube Webmail
 - Fix bug where namespace prefix could not be truncated on folders list if show_real_foldernames=true (#5695)
 - Fix undesired effects when postgres database uses different timezone than PHP host (#5708)
 - Installer: Fix DB schema initialization on MS SQL Server
+- Fix bug where base_dn setting was ignored inside group_filters (#5720)
 
 RELEASE 1.3-beta
 ----------------

program/lib/Roundcube/rcube_ldap.php

@@ -912,7 +912,7 @@ class rcube_ldap extends rcube_addressbook
     protected function extended_search($count = false)
     {
         $prop    = $this->group_id ? $this->group_data : $this->prop;
-        $base_dn = $this->group_id ? $this->groups_base_dn : $this->base_dn;
+        $base_dn = $this->group_id ? $prop['base_dn'] : $this->base_dn;
         $attrs   = $count ? array('dn') : $this->prop['attributes'];
         $entries = array();