Roundcube CVS crashes if mailbox empty

[gauret]

In Roundcube CVS, when there is no mail in the inbox,
it shows a blank screen after login, the browser keeps
loading, and nothing happens.
Here's a fix for that (it was not fixed these last weeks)

--- program/lib/imap.inc 11 Dec 2005 22:56:46 -0000 1.10
+++ program/lib/imap.inc 17 Dec 2005 17:13:52 -0000
@@ -1165,7 +1165,7 @@
        $result=array();
        $fp = $conn->fp;

-       if (empty($message_set)) return array();
+       if ($message_set == "1:0") return array();

        /*  Do "SELECT" command */
        if (!iil_C_Select($conn, $mailbox)){