[folks] individual: Add default values for PresenceDetails properties

[Philip Withnall <pwithnall src gnome org>]

commit 1cff44abae96df74cb98093355ea0bddec0f1197
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Thu Nov 21 20:08:07 2013 +0000

    individual: Add default values for PresenceDetails properties
    
    If an Individual is created with no Personas (as in the
    standalone-individuals test cases), the PresenceDetails properties
    should be initialised to empty strings. They were previously defaulting
    to null.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=648811

 folks/individual.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/folks/individual.vala b/folks/individual.vala
index 87e8f7a..67bdb10 100644
--- a/folks/individual.vala
+++ b/folks/individual.vala
@@ -231,12 +231,12 @@ public class Folks.Individual : Object,
    *
    * @since 0.6.0
    */
-  public string presence_status { get; set; }
+  public string presence_status { get; set; default = ""; }
 
   /**
    * { inheritDoc}
    */
-  public string presence_message { get; set; }
+  public string presence_message { get; set; default = ""; }
 
   /**
    * { inheritDoc}