[folks/648811-dummy-backend-rebase1] dummy: Fix nullability of a type in the persona store

[Philip Withnall <pwithnall src gnome org>]

commit 2f1631934a3a98a73de6bd8e26cadc80cfacf13d
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Nov 6 10:42:33 2013 +0000

    dummy: Fix nullability of a type in the persona store

 backends/dummy/lib/dummy-persona-store.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backends/dummy/lib/dummy-persona-store.vala b/backends/dummy/lib/dummy-persona-store.vala
index a7a3c24..5492318 100644
--- a/backends/dummy/lib/dummy-persona-store.vala
+++ b/backends/dummy/lib/dummy-persona-store.vala
@@ -184,7 +184,7 @@ public class Dummyf.PersonaStore : Folks.PersonaStore
 
   private HashMap<string, Persona> _personas;
   private Map<string, Persona> _personas_ro;
-  private HashSet<Persona> _pending_personas = null;
+  private HashSet<Persona>? _pending_personas = null;
 
   /**
    * The { link Persona}s exposed by this PersonaStore.