fix bug where user entered vacation details were not being returned when you go to set yourself away again

git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@607 a1433add-5e2c-0410-b055-b7f2511e0802

users/vacation.php

@@ -49,7 +49,8 @@ if ($_SERVER['REQUEST_METHOD'] == "GET")
     $tSubject = '';
     $tBody = '';
 
-    if($vh->get_details()) {
+    $details = $vh->get_details();
+    if($details != false) {
         $tSubject = $details['subject'];
         $tBody = $details['body'];
     }