Update Qvitter

diff --git a/plugins/Qvitter b/plugins/Qvitter
index af1635825d43168cbd5cefdf30b3bdd988c63e5d..15409967394b594bb54bd0ad3b604a210f927f3e 160000 (submodule)
--- a/plugins/Qvitter
+++ b/plugins/Qvitter
@@ -1 +1 @@
-Subproject commit af1635825d43168cbd5cefdf30b3bdd988c63e5d
+Subproject commit 15409967394b594bb54bd0ad3b604a210f927f3e