[gnome-boxes] Don't save last screenshot on display close if stopped

[Alexander Larsson <alexl src gnome org>]

commit d1c143405567b1b07e38607d350f9530651c6776
Author: Alexander Larsson <alexl redhat com>
Date:   Fri Aug 31 16:03:23 2012 +0200

    Don't save last screenshot on display close if stopped
    
    If the display is closed we take a last screenshot and
    use this. However, if it is disconnected due to e.g. a forced
    shutdown then we incorrectly override black "turned off"
    screenshot, so check this.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=683067

 src/machine.vala |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/src/machine.vala b/src/machine.vala
index 9671b54..14e42b1 100644
--- a/src/machine.vala
+++ b/src/machine.vala
@@ -203,12 +203,14 @@ private abstract class Boxes.Machine: Boxes.CollectionItem, Boxes.IPropertiesPro
         if (display == null)
             return;
 
-        try {
-            var pixbuf = display.get_pixbuf (0);
-            if (pixbuf != null)
-                set_screenshot (pixbuf, true);
-        } catch (GLib.Error error) {
-            warning (error.message);
+        if (state != MachineState.STOPPED) {
+            try {
+                var pixbuf = display.get_pixbuf (0);
+                if (pixbuf != null)
+                    set_screenshot (pixbuf, true);
+            } catch (GLib.Error error) {
+                warning (error.message);
+            }
         }
 
         App.app.display_page.remove_display ();