allowed '0' uid

diff --git a/lib/private/User/Database.php b/lib/private/User/Database.php
index dccdb790145a7328c9bbe4b87f8aa5b8f9d9d528..73c918e9944c99c2d0a5be9a2f8ce3712b01d125 100644 (file)
--- a/lib/private/User/Database.php
+++ b/lib/private/User/Database.php
@@ -239,7 +239,7 @@ class Database extends Backend implements IUserBackend {
        private function loadUser($uid) {
                if (!isset($this->cache[$uid])) {
                        //guests $uid could be NULL or ''
-                       if (empty($uid)) {
+                       if ($uid===null || $uid==='') {
                                $this->cache[$uid]=false;
                                return true;
                        }