[four-in-a-row] Require GTK+ 3.12

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 713c07715c87a2df1d7cdb1e58cc40f45d8aa0de
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun May 11 17:08:20 2014 -0500

    Require GTK+ 3.12
    
    For GTK_DIALOG_USE_HEADER_BAR

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c92d204..5afee38 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ dnl ###########################################################################
 dnl Dependencies
 dnl ###########################################################################
 
-GTK_REQUIRED=3.10.0
+GTK_REQUIRED=3.12.0
 RSVG_REQUIRED=2.32.0
 CANBERRA_GTK_REQUIRED=0.26