[gnome-boxes] display: config property now protected

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 031b7918dee1ff016d74a69515f9cdbabc4b6b31
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Mar 16 16:28:40 2016 +0000

    display: config property now protected
    
    It's only set by subclasses anyway.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761202

 src/display.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/display.vala b/src/display.vala
index ba9cd30..0909f39 100644
--- a/src/display.vala
+++ b/src/display.vala
@@ -5,7 +5,7 @@ private abstract class Boxes.Display: GLib.Object, Boxes.IPropertiesProvider {
     public abstract string protocol { get; }
     public abstract string uri { owned get; }
 
-    public BoxConfig? config { get; set; }
+    public BoxConfig? config { get; protected set; }
     public bool can_grab_mouse { get; protected set; }
     public bool mouse_grabbed { get; protected set; }
     public bool keyboard_grabbed { get; protected set; }