[gnome-boxes] spice-display: Disconnect channel signal handlers

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit fe8191f6ea20cf351bb84a2a95cea097654d1196
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue May 12 17:51:50 2015 +0100

    spice-display: Disconnect channel signal handlers
    
    Let's ensure channel signal handlers are disconnected and their IDs
    cleared on disconnection.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746800

 src/spice-display.vala |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/src/spice-display.vala b/src/spice-display.vala
index c4a86e7..87e6ea1 100644
--- a/src/spice-display.vala
+++ b/src/spice-display.vala
@@ -253,6 +253,14 @@ private class Boxes.SpiceDisplay: Boxes.Display {
     }
 
     public override void disconnect_it () {
+        if (channel_new_id > 0) {
+            (session as GLib.Object).disconnect (channel_new_id);
+            channel_new_id = 0;
+        }
+        if (channel_destroy_id > 0) {
+            (session as GLib.Object).disconnect (channel_destroy_id);
+            channel_destroy_id = 0;
+        }
         session.disconnect ();
         main_cleanup ();
     }