Empty $mailbox causes sent append to break.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@4767 7612ce4b-ef26-0410-bec9-ea0150e637f0

diff --git a/functions/imap_mailbox.php b/functions/imap_mailbox.php
index f13bae916ebd45aaca1df4982175f719d4890edf..bb46e6f3e7959e2d5ffbce86545fb66ed874fdc8 100755 (executable)
--- a/functions/imap_mailbox.php
+++ b/functions/imap_mailbox.php
@@ -188,7 +188,7 @@ function sqimap_mailbox_expunge ($imap_stream, $mailbox, $handle_errors = true,
 
 /* Checks whether or not the specified mailbox exists */
 function sqimap_mailbox_exists ($imap_stream, $mailbox) {
 
 /* Checks whether or not the specified mailbox exists */
 function sqimap_mailbox_exists ($imap_stream, $mailbox) {

-    if (!isset($mailbox)) {
+    if (!isset($mailbox) || empty($mailbox)) {

         return false;
     }
     $mbx = sqimap_run_command($imap_stream, "LIST \"\" \"$mailbox\"",
         return false;
     }
     $mbx = sqimap_run_command($imap_stream, "LIST \"\" \"$mailbox\"",