[gtk+] Add another forgotten symbol

[Matthias Clasen <matthiasc src gnome org>]

commit 282e7c390e4e8ec48ccf380916f3d15a9c2674de
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 25 10:49:24 2013 +0100

    Add another forgotten symbol

 docs/reference/gdk/gdk3-sections.txt |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gdk/gdk3-sections.txt b/docs/reference/gdk/gdk3-sections.txt
index f90c0c0..3b05221 100644
--- a/docs/reference/gdk/gdk3-sections.txt
+++ b/docs/reference/gdk/gdk3-sections.txt
@@ -989,6 +989,7 @@ gdk_x11_window_set_hide_titlebar_when_maximized
 gdk_x11_window_set_theme_variant
 gdk_x11_window_set_user_time
 gdk_x11_window_move_to_current_desktop
+gdk_x11_window_set_utf8_property
 gdk_x11_get_default_root_xwindow
 gdk_x11_get_default_screen
 gdk_x11_get_default_xdisplay