Fix UIDVALIDITY change detection

The 'is_reset' flag was lost during a
INFO -> DEBUG log level change in
commit 3956351

Probably a botched merge since there were
two corrections to this code later on, too.

-> restore it. Originally introduced by bugs.horde.org entry #11807.

framework/Kolab_Storage/lib/Horde/Kolab/Storage/Data/Cached.php

@@ -262,7 +262,7 @@ public function synchronize($params = array())
                 '[KOLAB_STORAGE] Complete folder sync: user: %s, folder: %s, is_reset: %d',
                 $user, $folder_path, $is_reset)
             );
-            $this->_completeSynchronization($current);
+            $this->_completeSynchronization($current, array('is_reset' => $is_reset));
             return;
         }