[gnome-control-center] build: Bump GTK+ requirements for new API in GtkHeaderBar

[Rui Matos <rtcm src gnome org>]

commit 8b2eec6fee467e017bd8fbe037353b2cb53ea407
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon Aug 19 16:38:43 2013 +0100

    build: Bump GTK+ requirements for new API in GtkHeaderBar

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 627c59b..799df81 100644
--- a/configure.ac
+++ b/configure.ac
@@ -84,7 +84,7 @@ dnl Check that we meet the  dependencies
 dnl ==============================================
 
 GLIB_REQUIRED_VERSION=2.35.1
-GTK_REQUIRED_VERSION=3.9.10
+GTK_REQUIRED_VERSION=3.9.11
 PA_REQUIRED_VERSION=2.0
 CANBERRA_REQUIRED_VERSION=0.13
 GDKPIXBUF_REQUIRED_VERSION=2.23.0