Update Qvitter

diff --git a/plugins/Qvitter b/plugins/Qvitter
index 9bc1ea3003f43a2d164680ea08de294433b10046..d34fac4a7ffea238fbb36bf5271d9ec2589ab21f 160000 (submodule)
--- a/plugins/Qvitter
+++ b/plugins/Qvitter
@@ -1 +1 @@
-Subproject commit 9bc1ea3003f43a2d164680ea08de294433b10046
+Subproject commit d34fac4a7ffea238fbb36bf5271d9ec2589ab21f