[metacity] libmetacity: fix typo in signal name

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 4776c2697d3227d38e66396c9a64db199a372215
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Jun 22 12:47:20 2016 +0300

    libmetacity: fix typo in signal name

 libmetacity/meta-theme.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libmetacity/meta-theme.c b/libmetacity/meta-theme.c
index b524d30..3dfb392 100644
--- a/libmetacity/meta-theme.c
+++ b/libmetacity/meta-theme.c
@@ -525,7 +525,7 @@ meta_theme_load (MetaTheme    *theme,
       if (theme->gtk_theme_name_id == 0)
         {
           theme->gtk_theme_name_id =
-            g_signal_connect (settings, "notify:gtk-theme-name",
+            g_signal_connect (settings, "notify::gtk-theme-name",
                               G_CALLBACK (notify_gtk_theme_name_cb), theme);
         }
     }