[vala/staging] glib-2.0: Fix RecMutexLocker binding

[Rico Tzschichholz <ricotz src gnome org>]

commit bc1e4cf40304830b71b2ad81c406e3944be440f5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Jul 9 13:22:26 2019 +0200

    glib-2.0: Fix RecMutexLocker binding

 vapi/glib-2.0.vapi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 21b27cae5..0e1292e6b 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -2086,8 +2086,9 @@ namespace GLib {
        }
 
        [Version (since = "2.60")]
+       [Compact]
        [CCode (destroy_function = "g_rec_mutex_locker_free")]
-       public struct RecMutexLocker {
+       public class RecMutexLocker {
                public RecMutexLocker (RecMutex rec_mutex);
                public void free ();
        }