[pango] Make static data thread safe in pangocairo-fcfont.c

[Behdad Esfahbod <behdad src gnome org>]

commit ba9119bcef52232c38329a5be91d9b5d158f2bc4
Author: Alessandro Pignotti <a pignotti sssup it>
Date:   Wed May 25 15:54:01 2011 +0200

    Make static data thread safe in pangocairo-fcfont.c

 pango/pangocairo-fcfont.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/pango/pangocairo-fcfont.c b/pango/pangocairo-fcfont.c
index 1393ce8..6e4fcd9 100644
--- a/pango/pangocairo-fcfont.c
+++ b/pango/pangocairo-fcfont.c
@@ -187,8 +187,8 @@ get_gravity_class (void)
 {
   static GEnumClass *class = NULL;
 
-  if (G_UNLIKELY (!class))
-    class = g_type_class_ref (PANGO_TYPE_GRAVITY);
+  if (g_once_init_enter ((gsize*)&class))
+    g_once_init_leave((gsize*)&class, (gsize)g_type_class_ref (PANGO_TYPE_GRAVITY));
 
   return class;
 }