[folks] Don't use const string[] , Vala doesn't handle them correctly

[Raul Gutierrez Segales <raulgs src gnome org>]

commit 96da6b9da72a754597b940c065154e0acf0f1a00
Author: Raul Gutierrez Segales <rgs collabora co uk>
Date:   Tue Aug 16 20:03:03 2011 +0100

    Don't use const string[] , Vala doesn't handle them correctly

 backends/libsocialweb/lib/swf-persona.vala |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/backends/libsocialweb/lib/swf-persona.vala b/backends/libsocialweb/lib/swf-persona.vala
index ae484e0..ba84326 100644
--- a/backends/libsocialweb/lib/swf-persona.vala
+++ b/backends/libsocialweb/lib/swf-persona.vala
@@ -40,7 +40,14 @@ public class Swf.Persona : Folks.Persona,
       "im-addresses",
       "web-service-addresses"
     };
-  private const string[] _writeable_properties = {}; // No writeable properties
+
+  /* No writeable properties
+   *
+   * FIXME: we can't mark this as const because Vala gets confused
+   *        and generates the wrong C output (char *arr[0] = {}
+   *        instead of char **arr = NULL)
+   */
+  private static string[] _writeable_properties = {};
 
   /**
    * The names of the Persona's linkable properties.