update qvitter

diff --git a/plugins/Qvitter b/plugins/Qvitter
index 5a6b68289ac7d001f5bad3993efcf1bee813a604..4e39d59885bf091f1fc90d27f45101c72bef85b3 160000 (submodule)
--- a/plugins/Qvitter
+++ b/plugins/Qvitter
@@ -1 +1 @@
-Subproject commit 5a6b68289ac7d001f5bad3993efcf1bee813a604
+Subproject commit 4e39d59885bf091f1fc90d27f45101c72bef85b3