[glib] GRegex: fix thread-unsafe initialiser code

[Ryan Lortie <ryanl src gnome org>]

commit 066c7b81211fe203d2f7a4c7556c05bd53293097
Author: Ryan Lortie <desrt desrt ca>
Date:   Fri Sep 9 19:54:06 2011 -0400

    GRegex: fix thread-unsafe initialiser code

 glib/gregex.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glib/gregex.c b/glib/gregex.c
index d07036b..74a2b0f 100644
--- a/glib/gregex.c
+++ b/glib/gregex.c
@@ -1187,7 +1187,7 @@ g_regex_new (const gchar         *pattern,
   gint erroffset;
   gint errcode;
   gboolean optimize = FALSE;
-  static gboolean initialized = FALSE;
+  static gsize initialised;
   unsigned long int pcre_compile_options;
 
   g_return_val_if_fail (pattern != NULL, NULL);
@@ -1195,7 +1195,7 @@ g_regex_new (const gchar         *pattern,
   g_return_val_if_fail ((compile_options & ~G_REGEX_COMPILE_MASK) == 0, NULL);
   g_return_val_if_fail ((match_options & ~G_REGEX_MATCH_MASK) == 0, NULL);
 
-  if (!initialized)
+  if (g_once_init_enter (&initialised))
     {
       gint support;
       const gchar *msg;
@@ -1218,7 +1218,7 @@ g_regex_new (const gchar         *pattern,
           return NULL;
         }
 
-      initialized = TRUE;
+      g_once_init_leave (&initialised, TRUE);
     }
 
   /* G_REGEX_OPTIMIZE has the same numeric value of PCRE_NO_UTF8_CHECK,