[dconf: 5/7] engine: seal the in_flight queue before sending it

[Daniel Playfair Cal <danielplayfaircal src gnome org>]

commit 4f90c7927335712edd875cbea395c01fb48f748b
Author: Daniel Playfair Cal <daniel playfair cal gmail com>
Date:   Tue May 5 21:04:30 2020 +1000

    engine: seal the in_flight queue before sending it
    
    It would be wrong to change the in_flight queue, so seal it to ensure
    that it is consistently sealed.

 engine/dconf-engine.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/engine/dconf-engine.c b/engine/dconf-engine.c
index 18b8aa54..cbb2a00e 100644
--- a/engine/dconf-engine.c
+++ b/engine/dconf-engine.c
@@ -1208,6 +1208,7 @@ dconf_engine_manage_queue (DConfEngine *engine)
                                          G_VARIANT_TYPE ("(s)"), sizeof (OutstandingChange));
 
       oc->change = engine->in_flight = g_steal_pointer (&engine->pending);
+      dconf_changeset_seal (engine->in_flight);
 
       parameters = dconf_engine_prepare_change (engine, oc->change);