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

[Behdad Esfahbod <behdad src gnome org>]

commit 86d88852671426517c532e9d2ad7f998061b8ea3
Author: Alessandro Pignotti <a pignotti sssup it>
Date:   Fri May 20 23:03:57 2011 +0200

    Make static data thread safe in pangocairo-fontmap.c

 pango/pangocairo-fontmap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/pango/pangocairo-fontmap.c b/pango/pangocairo-fontmap.c
index 0bea979..cfc658f 100644
--- a/pango/pangocairo-fontmap.c
+++ b/pango/pangocairo-fontmap.c
@@ -149,8 +149,8 @@ static PangoFontMap *default_font_map = NULL;
 PangoFontMap *
 pango_cairo_font_map_get_default (void)
 {
-  if (G_UNLIKELY (!default_font_map))
-    default_font_map = pango_cairo_font_map_new ();
+  if (g_once_init_enter ((gsize*)&default_font_map))
+    g_once_init_leave((gsize*)&default_font_map, (gsize)pango_cairo_font_map_new ());
 
   return default_font_map;
 }