[folks] ofono: Work around a Vala bug causing a double-free when adding a modem

[Philip Withnall <pwithnall src gnome org>]

commit 4107cef64ae54fcd652fa64a6ef5b348fc77f8bc
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Tue Oct 8 19:29:38 2013 +0100

    ofono: Work around a Vala bug causing a double-free when adding a modem
    
    Work around Vala bug #709665:
        https://bugzilla.gnome.org/show_bug.cgi?id=709665
    which allowed an assignment of a string*[] value to a string[] variable.
    string*[] values need the container freeing, but not the members of the
    array. However, since the variable was a string[], Vala generated C code to
    free both the container and the members, resulting in a double-free of each
    member.

 backends/ofono/ofono-backend.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/backends/ofono/ofono-backend.vala b/backends/ofono/ofono-backend.vala
index 1410917..a63d4b4 100644
--- a/backends/ofono/ofono-backend.vala
+++ b/backends/ofono/ofono-backend.vala
@@ -273,8 +273,8 @@ public class Folks.Backends.Ofono.Backend : Folks.Backend
       if (features_variant != null)
         {
           string alias = this._modem_alias (properties);
-          string[] features = features_variant.get_strv ();
-          
+          var features = features_variant.get_strv ();
+
           foreach (string feature in features)
             {
               if (feature == "sim")