gtk: mark MultiSelection::get_model as nullable

the constructor & setter takes a nullable model

diff --git a/gtk/gtkmultiselection.c b/gtk/gtkmultiselection.c
index 26590ec55feb9aed2d842b76371a20e40f6353be..bee83622c6b9f31f3b4763c5dc0093fdd65e908a 100644 (file)
--- a/gtk/gtkmultiselection.c
+++ b/gtk/gtkmultiselection.c
@@ -396,7 +396,7 @@ gtk_multi_selection_new (GListModel *model)
  *
  * Returns the underlying model of @self.
  *
- * Returns: (transfer none): the underlying model
+ * Returns: (transfer none) (nullable): the underlying model
  */
 GListModel *
 gtk_multi_selection_get_model (GtkMultiSelection *self)