[five-or-more] Require GTK+ 3.12

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ada09c9214a69b7095222e2aa9c3bdc6dac9d007
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun May 11 17:00:03 2014 -0500

    Require GTK+ 3.12
    
    For GtkDialog::use-header-bar

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5a1a294..0ea706a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ dnl ###########################################################################
 dnl Dependencies
 dnl ###########################################################################
 
-GTK_REQUIRED=3.10
+GTK_REQUIRED=3.12.0
 RSVG_REQUIRED=2.32.0
 
 PKG_CHECK_MODULES(FIVE_OR_MORE, [