[empathy] bump GTK+ dep to 2.22.0

[Guillaume Desmottes <gdesmott src gnome org>]

commit 160736f1ea4964d5f6164c42913c094c6d25774f
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Mon Sep 20 11:33:45 2010 +0200

    bump GTK+ dep to 2.22.0

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 53b60f7..2b80f37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@ FOLKS_REQUIRED=0.1.15
 GCONF_REQUIRED=1.2.0
 GLIB_REQUIRED=2.25.9
 GNUTLS_REQUIRED=2.8.5
-GTK_REQUIRED=2.21.2
+GTK_REQUIRED=2.22.0
 KEYRING_REQUIRED=2.26.0
 LIBCANBERRA_GTK_REQUIRED=0.4
 LIBNOTIFY_REQUIRED=0.4.4