[gnome-boxes] Do not mix draw_id and cursor_id

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

commit e1015a6c21036a76111a912c01c18f48e0809d32
Author: Marc-Andrà Lureau <marcandre lureau gmail com>
Date:   Tue Feb 21 02:08:54 2012 +0100

    Do not mix draw_id and cursor_id
    
    This avoid warnings if disconnecting wrong handler in remove_display()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=670539

 src/display-page.vala |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/display-page.vala b/src/display-page.vala
index 9c2a9ef..b6f776f 100644
--- a/src/display-page.vala
+++ b/src/display-page.vala
@@ -175,8 +175,9 @@ private class Boxes.DisplayPage: GLib.Object {
             return false;
         });
 
-        cursor_id = display.draw.connect (() => {
-            display.disconnect (cursor_id);
+        ulong draw_id = 0;
+        draw_id = display.draw.connect (() => {
+            display.disconnect (draw_id);
 
             cursor_id = display.get_window ().notify["cursor"].connect (() => {
                 event_box.get_window ().set_cursor (display.get_window ().cursor);