[gvfs] udisks2: Define SECRET_API_SUBJECT_TO_CHANGE to silence warning

[Ross Lagerwall <rossl src gnome org>]

commit 17fc415acc2a6b69cd03951f636692763b23ce41
Author: Ross Lagerwall <rosslagerwall gmail com>
Date:   Mon Nov 18 08:15:28 2013 +0200

    udisks2: Define SECRET_API_SUBJECT_TO_CHANGE to silence warning
    
    https://bugzilla.gnome.org/show_bug.cgi?id=712382

 monitor/udisks2/gvfsudisks2volume.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/monitor/udisks2/gvfsudisks2volume.c b/monitor/udisks2/gvfsudisks2volume.c
index 6091a27..0980233 100644
--- a/monitor/udisks2/gvfsudisks2volume.c
+++ b/monitor/udisks2/gvfsudisks2volume.c
@@ -32,6 +32,7 @@
 #include <gio/gio.h>
 
 #ifdef HAVE_KEYRING
+#define SECRET_API_SUBJECT_TO_CHANGE
 #include <libsecret/secret.h>
 #endif