[totem] main: Allow passing empty display name to add_to_playlist()

[Bastien Nocera <hadess src gnome org>]

commit cb9483fa7ecdbfc9964bad87b42797eb30b775d7
Author: Bastien Nocera <hadess hadess net>
Date:   Sat Oct 2 16:12:34 2021 +0200

    main: Allow passing empty display name to add_to_playlist()

 src/totem-object.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/totem-object.c b/src/totem-object.c
index 87720b648..01f05f344 100644
--- a/src/totem-object.c
+++ b/src/totem-object.c
@@ -800,7 +800,7 @@ setup_save_timeout_cb (Totem    *totem,
  * totem_object_add_to_playlist:
  * @totem: a #TotemObject
  * @uri: the URI to add to the playlist
- * @display_name: the display name of the URI
+ * @display_name: (allow-none): the display name of the URI
  * @play: whether to play the added item
  *
  * Add @uri to the playlist and play it immediately.