[gnome-games] core: Add Cover.changed() signal

[Adrien Plazas <aplazas src gnome org>]

commit 594db2c7b7b47985f49f655d1b6120a2e039a4a2
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri May 13 09:17:04 2016 +0200

    core: Add Cover.changed() signal
    
    This will be used to notify that a new cover is available.

 src/core/cover.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/core/cover.vala b/src/core/cover.vala
index 7bdc778..2c45812 100644
--- a/src/core/cover.vala
+++ b/src/core/cover.vala
@@ -1,5 +1,7 @@
 // This file is part of GNOME Games. License: GPLv3
 
 public interface Games.Cover : Object {
+       public signal void changed ();
+
        public abstract GLib.Icon? get_cover ();
 }