[gnome-contacts] Fix error due to missing nullable type

[Alexander Larsson <alexl src gnome org>]

commit 9898eeb69de98b73a440c514751d1ed889a78285
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Aug 25 21:03:41 2011 +0200

    Fix error due to missing nullable type

 src/contacts-contact-pane.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/contacts-contact-pane.vala b/src/contacts-contact-pane.vala
index 03cc775..89dfbfa 100644
--- a/src/contacts-contact-pane.vala
+++ b/src/contacts-contact-pane.vala
@@ -535,7 +535,7 @@ public class Contacts.ContactPane : EventBox {
 
   private void add_url_editor (DetailsLayout layout,
 			       Set<AbstractFieldDetails> detail_set,
-			       UrlFieldDetails url) {
+			       UrlFieldDetails? url) {
     if (layout.grid.get_children ().length () == 0)
       layout.add_label ("Links");