[gnome-chess] promotion dialog: use header bar

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 17bd099798cb0acf5a560cd26bde2d0b729b9efc
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri Jul 4 22:14:43 2014 -0500

    promotion dialog: use header bar

 data/promotion-type-selector.ui |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/data/promotion-type-selector.ui b/data/promotion-type-selector.ui
index ae0321c..f4045b6 100644
--- a/data/promotion-type-selector.ui
+++ b/data/promotion-type-selector.ui
@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <!-- interface-requires gtk+ 3.0 -->
+  <!-- interface-requires gtk+ 3.12 -->
   <object class="GtkDialog" id="dialog_promotion_type_selector">
     <property name="can_focus">False</property>
     <property name="border_width">5</property>
     <property name="title" translatable="yes">Select Promotion Type</property>
     <property name="type_hint">dialog</property>
     <property name="has_resize_grip">False</property>
+    <property name="use_header_bar">1</property>
     <child internal-child="vbox">
       <object class="GtkBox" id="dialog-vbox1">
         <property name="can_focus">False</property>