[gnome-boxes] Allow Display::connect_it to throw errors

[Christophe Fergeau <teuf src gnome org>]

commit 49cbb6fccab8e1614abc744e424e84f43347bc06
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Mon Sep 17 16:34:47 2012 +0200

    Allow Display::connect_it to throw errors
    
    It's only called from Machine::connect_display overrides from
    where we want to be able to forward connection errors to the caller.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=684224

 src/display.vala       |    2 +-
 src/spice-display.vala |    2 +-
 src/vnc-display.vala   |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/display.vala b/src/display.vala
index 7f75f35..d9a9436 100644
--- a/src/display.vala
+++ b/src/display.vala
@@ -20,7 +20,7 @@ private abstract class Boxes.Display: Boxes.DisplayProperties, Boxes.IProperties
     public abstract Gdk.Pixbuf? get_pixbuf (int n) throws Boxes.Error;
     public abstract void set_enable_inputs (Gtk.Widget widget, bool enable);
 
-    public abstract void connect_it ();
+    public abstract void connect_it () throws GLib.Error;
     public abstract void disconnect_it ();
 
     public abstract List<Boxes.Property> get_properties (Boxes.PropertiesPage page);
diff --git a/src/spice-display.vala b/src/spice-display.vala
index df428b0..dbc8797 100644
--- a/src/spice-display.vala
+++ b/src/spice-display.vala
@@ -119,7 +119,7 @@ private class Boxes.SpiceDisplay: Boxes.Display, Boxes.IPropertiesProvider {
         return display.get_pixbuf ();
     }
 
-    public override void connect_it () {
+    public override void connect_it () throws GLib.Error {
         main_cleanup ();
 
         // FIXME: vala does't want to put this in ctor..
diff --git a/src/vnc-display.vala b/src/vnc-display.vala
index 5fc7232..35b54de 100644
--- a/src/vnc-display.vala
+++ b/src/vnc-display.vala
@@ -111,7 +111,7 @@ private class Boxes.VncDisplay: Boxes.Display {
         return display.get_pixbuf ();
     }
 
-    public override void connect_it () {
+    public override void connect_it () throws GLib.Error {
         // FIXME: we ignore return value which seems to be inconsistent
         display.set_credential (DisplayCredential.USERNAME, username);
         display.set_credential (DisplayCredential.PASSWORD, password);