Fix bug where mail search could return empty result on servers without SORT capability (#5973)

CHANGELOG

@@ -51,6 +51,7 @@ CHANGELOG Roundcube Webmail
 - Enigma: Fix decryption of messages encoded with non-ascii charset (#5962)
 - Fix missing cursor in HTML editor on mail reply (#5969)
 - Fix (again) bug where image data URIs in css style were treated as evil/remote in mail preview (#5580)
+- Fix bug where mail search could return empty result on servers without SORT capability (#5973)
 
 RELEASE 1.3.1
 -------------

program/lib/Roundcube/rcube_imap.php

@@ -1390,8 +1390,7 @@ class rcube_imap extends rcube_storage
                     $index  = new rcube_result_index($folder, '* ESEARCH ALL ' . $search);
                 }
                 else {
-                    $index = $this->index_direct($folder, $this->search_charset,
-                        $this->sort_field, $this->search_set);
+                    $index = $this->index_direct($folder, $this->sort_field, $this->sort_order, $this->search_set);
                 }
             }