[gnome-control-center] build: bump required GTK+ version

[Cosimo Cecchi <cosimoc src gnome org>]

commit 3bb23fef60b08edcbbff9ebc93fe09ee01092cae
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Dec 1 17:07:10 2010 +0100

    build: bump required GTK+ version

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 13de79d..e437385 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,7 +76,7 @@ dnl Check that we meet the  dependencies
 dnl ==============================================
 
 GLIB_REQUIRED_VERSION=2.25.11
-GTK_REQUIRED_VERSION=2.91.5
+GTK_REQUIRED_VERSION=2.91.6
 DESKTOP_SCHEMAS_REQUIRED_VERSION=0.1.2
 PA_REQUIRED_VERSION=0.9.16
 CANBERRA_REQUIRED_VERSION=0.13