[gnome-system-tools] Bump GTK+ requirement to 2.16

[Milan Bouchet-Valat <milanbv src gnome org>]

commit 5e0bb398534d17af52b33f793ec5108283969cb1
Author: Milan Bouchet-Valat <nalimilan club fr>
Date:   Tue Aug 25 23:40:28 2009 +0200

    Bump GTK+ requirement to 2.16
    
    We need that version for GtkBuilder to work with text attributes, and possibly models too.

 configure.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index 27c5a1e..9d1d7a8 100644
--- a/configure.in
+++ b/configure.in
@@ -29,7 +29,7 @@ AC_PATH_PROG(GLIB_GENMARSHAL, glib-genmarshal)
 
 STB_REQUIRED=2.8
 LIBOOBS_REQUIRED=2.21.3
-GTK_REQUIRED=2.12
+GTK_REQUIRED=2.16
 GLIB_REQUIRED=2.15.2
 GCONF_REQUIRED=2.2.0
 DBUS_REQUIRED=0.32