[glib/wip/tintou/gdbussignalcallback] gdbusconnection: GDBusSignalCallback can have a NULL sender_name

[Corentin Noël <corentinnoel src gnome org>]

commit f86681124e40d8752a3b56872f59eab023b8edb7
Author: Corentin Noël <corentin elementary io>
Date:   Sat Mar 28 19:30:37 2020 +0100

    gdbusconnection: GDBusSignalCallback can have a NULL sender_name
    
    On a peer GDBusConnection, the returned sender_name can be NULL

 gio/gdbusconnection.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gio/gdbusconnection.h b/gio/gdbusconnection.h
index f7f08a3cc..cd508d0fe 100644
--- a/gio/gdbusconnection.h
+++ b/gio/gdbusconnection.h
@@ -550,7 +550,7 @@ gboolean         g_dbus_connection_unregister_subtree         (GDBusConnection
 /**
  * GDBusSignalCallback:
  * @connection: A #GDBusConnection.
- * @sender_name: The unique bus name of the sender of the signal.
+ * @sender_name: (nullable): The unique bus name of the sender of the signal.
  * @object_path: The object path that the signal was emitted on.
  * @interface_name: The name of the interface.
  * @signal_name: The name of the signal.