[gnome-keyring] gcr: Compatiblity fix for glib 2.28.x

[Stefan Walter <stefw src gnome org>]

commit f6e3f6636c7210c1fe1766fcad2b128ef8a656a8
Author: Stef Walter <stefw collabora co uk>
Date:   Tue Sep 27 09:19:18 2011 +0200

    gcr: Compatiblity fix for glib 2.28.x

 gcr/gcr-library.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gcr/gcr-library.c b/gcr/gcr-library.c
index b887ba3..409f6b4 100644
--- a/gcr/gcr-library.c
+++ b/gcr/gcr-library.c
@@ -115,7 +115,11 @@ _gcr_initialize_library (void)
 {
 	static gint gcr_initialize = 0;
 
+#if GLIB_CHECK_VERSION (2,30,0)
 	if (g_atomic_int_add (&gcr_initialize, 1) == 0)
+#else
+	if (g_atomic_int_exchange_and_add (&gcr_initialize, 1) == 0)
+#endif
 		return;
 
 	/* Initialize the libgcrypt library if needed */