[gnome-boxes] Immediately update screenshot when leaving display

[Marc-Andre Lureau <malureau src gnome org>]

commit 6c383afd246e58c1cc4fa1a37e8e01f8a79b8ee8
Author: Marc-Andrà Lureau <marcandre lureau gmail com>
Date:   Thu Oct 20 00:24:10 2011 +0200

    Immediately update screenshot when leaving display

 src/app.vala     |    1 +
 src/machine.vala |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/app.vala b/src/app.vala
index ba913fc..d074248 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -171,6 +171,7 @@ private class Boxes.App: Boxes.UI {
                 var machine = current_item as Machine;
 
                 machine.connect_display = false;
+                machine.update_screenshot.begin ();
             }
             ui_state = UIState.COLLECTION;
         }
diff --git a/src/machine.vala b/src/machine.vala
index 66728dc..a811e4d 100644
--- a/src/machine.vala
+++ b/src/machine.vala
@@ -161,7 +161,7 @@ private class Boxes.Machine: Boxes.CollectionItem {
         return get_pkgcache (uuid + "-screenshot." + ext);
     }
 
-    private async void update_screenshot (int width = 128, int height = 96) {
+    public async void update_screenshot (int width = 128, int height = 96) {
         Gdk.Pixbuf? pixbuf = null;
 
         try {