[krb5-auth-dialog] Bump minimum required GTK+ version

[Guido Günther <guidog src gnome org>]

commit 5d15c67b20816cb9990d7cb6154ba8d1346ca90c
Author: Guido Günther <agx sigxcpu org>
Date:   Fri Oct 24 16:28:57 2014 +0200

    Bump minimum required GTK+ version
    
    for the dialogs header bar handling.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ed1aab7..f203b50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ AM_PROG_CC_C_O
 KA_COMPILE_WARNINGS([maximum])
 GNOME_DOC_INIT
 
-GTK_REQUIRED=3.0
+GTK_REQUIRED=3.14
 GLIB_REQUIRED=2.28
 LIBNOTIFY_REQUIRED=0.7.0