[gtk+] Annotate gdk_x11_display_get_screen()

[Emmanuele Bassi <ebassi src gnome org>]

commit cc80a2ec8e327cbd889498b111b0c4f4fac90709
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Dec 21 18:49:25 2017 +0000

    Annotate gdk_x11_display_get_screen()
    
    We're missing the gtk-doc stanza, as well as the transfer annotation for
    the returned pointer.

 gdk/x11/gdkdisplay-x11.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/gdkdisplay-x11.c b/gdk/x11/gdkdisplay-x11.c
index 5b1b884..762de7f 100644
--- a/gdk/x11/gdkdisplay-x11.c
+++ b/gdk/x11/gdkdisplay-x11.c
@@ -2906,6 +2906,14 @@ gdk_x11_display_get_max_request_size (GdkDisplay *display)
   return size;
 }
 
+/**
+ * gdk_x11_display_get_screen:
+ * @display: a #GdkX11Display
+ *
+ * Retrieves the #GdkX11Screen of the @display.
+ *
+ * Returns: (transfer none): the #GdkX11Screen
+ */
 GdkX11Screen *
 gdk_x11_display_get_screen (GdkDisplay *display)
 {