[gnome-boxes] machine: Add 'is_stopped' prop

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 292855aea51bb53c38d9c66771134c5d05967311
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Jul 2 16:11:18 2015 +0200

    machine: Add 'is_stopped' prop
    
    This is be needed by next commits to easily check if a machine is
    stopped to draw a special thumbnail for them.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730258

 src/machine.vala |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/machine.vala b/src/machine.vala
index 53ef20e..c323cc3 100644
--- a/src/machine.vala
+++ b/src/machine.vala
@@ -48,6 +48,12 @@ private abstract class Boxes.Machine: Boxes.CollectionItem, Boxes.IPropertiesPro
         }
     }
 
+    public bool is_stopped {
+        get {
+            return state == Machine.MachineState.FORCE_STOPPED || state == Machine.MachineState.STOPPED;
+        }
+    }
+
     private ulong show_id;
     private ulong hide_id;
     private ulong disconnected_id;