Add nullable return annotation to gtk_notebook_get_tab_label

https://bugzilla.gnome.org/show_bug.cgi?id=781935

diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index b6b37d15215074ad64b9c6b071b777ec0aaaf8ba..e75ac50ab206f588c654ad0c222067938ab0227a 100644 (file)
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -7310,7 +7310,7 @@ gtk_notebook_popup_disable (GtkNotebook *notebook)
  * %NULL is returned if @child is not in @notebook or
  * if no tab label has specifically been set for @child.
  *
- * Returns: (transfer none): the tab label
+ * Returns: (transfer none) (nullable): the tab label
  */
 GtkWidget *
 gtk_notebook_get_tab_label (GtkNotebook *notebook,