[glibmm] Add ListStore to extra objects .defs.

[Murray Cumming <murrayc src gnome org>]

commit 087d0c185058174082ae6d604546310a3c612e90
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Sep 20 16:42:51 2015 +0200

    Add ListStore to extra objects .defs.

 gio/src/gio_extra_objects.defs |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gio/src/gio_extra_objects.defs b/gio/src/gio_extra_objects.defs
index 5ef3e06..4f75f32 100644
--- a/gio/src/gio_extra_objects.defs
+++ b/gio/src/gio_extra_objects.defs
@@ -145,6 +145,12 @@
   (gtype-id "G_TYPE_LIST_MODEL")
 )
 
+(define-object ListStore
+  (in-module "Gio")
+  (c-name "GListStore")
+  (gtype-id "G_TYPE_LIST_STORE")
+)
+
 (define-object Menu
   (in-module "Gio")
   (c-name "GMenu")