[gnome-shell] st: Fix a minor leak

[Florian Müllner <fmuellner src gnome org>]

commit 40bd65c9ba929836e88e66c959d6f80a8383f01f
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat May 11 08:18:00 2019 +0000

    st: Fix a minor leak
    
    StSetting is used as a singleton, so this leak does not matter in
    practise.
    
    Spotted by Jonas Dreßler.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/486

 src/st/st-settings.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/st/st-settings.c b/src/st/st-settings.c
index 66f3908730..7fbc5fbe0e 100644
--- a/src/st/st-settings.c
+++ b/src/st/st-settings.c
@@ -86,6 +86,7 @@ st_settings_finalize (GObject *object)
 
   g_object_unref (settings->interface_settings);
   g_object_unref (settings->mouse_settings);
+  g_object_unref (settings->a11y_settings);
   g_free (settings->gtk_theme);
   g_free (settings->gtk_icon_theme);