[vala] gobject-2.0: Mark parameter of WeakRef() and WeakRef.set() as nullable

[JÃrg Billeter <juergbi src gnome org>]

commit d3be570a4dd8fd911dcb8c9e4977d1265f6ea5da
Author: Philip Withnall <philip tecnocode co uk>
Date:   Sun Sep 2 21:34:10 2012 +0100

    gobject-2.0: Mark parameter of WeakRef() and WeakRef.set() as nullable
    
    Fixes bug 683227.

 vapi/gobject-2.0.vapi |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/gobject-2.0.vapi b/vapi/gobject-2.0.vapi
index e4aae29..0840c11 100644
--- a/vapi/gobject-2.0.vapi
+++ b/vapi/gobject-2.0.vapi
@@ -381,9 +381,9 @@ namespace GLib {
 
 	[CCode (destroy_function = "g_weak_ref_clear")]
 	public struct WeakRef {
-		public WeakRef (GLib.Object object);
+		public WeakRef (GLib.Object? object);
 		public GLib.Object? get ();
-		public void set (GLib.Object object);
+		public void set (GLib.Object? object);
 	}
 
 	[CCode (instance_pos = 0)]