[gnome-klotski] Bump required Gtk version to 3.12

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 34883a12b662cc2cef726929901b478b04788e5d
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Sep 9 05:37:59 2014 +0200

    Bump required Gtk version to 3.12
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736301

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index da08c9d..0506349 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@ dnl Dependencies
 dnl ###########################################################################
 
 GLIB_REQUIRED=2.40.0
-GTK_REQUIRED=3.10.0
+GTK_REQUIRED=3.12.0
 RSVG_REQUIRED=2.32.0
 
 PKG_CHECK_MODULES(GNOME_KLOTSKI, [