[gnote] Add missing include

[Aurimas Černius <aurimasc src gnome org>]

commit 3faf1fb002b5b5b885394ebac77abf3db9105c4e
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Fri Feb 28 23:35:08 2014 +0200

    Add missing include

 src/dbus/searchprovider.cpp |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/dbus/searchprovider.cpp b/src/dbus/searchprovider.cpp
index c9e8cba..28e2658 100644
--- a/src/dbus/searchprovider.cpp
+++ b/src/dbus/searchprovider.cpp
@@ -21,6 +21,8 @@
 #include <giomm/dbusconnection.h>
 #include <giomm/dbuserror.h>
 
+#include <set>
+
 #include "debug.hpp"
 #include "iconmanager.hpp"
 #include "ignote.hpp"