[gom] sorting: Fix compile-time warning

[Bastien Nocera <hadess src gnome org>]

commit 458a8ecdffe5f6c36ab08d0dde89f3d06a32b580
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Aug 24 22:32:16 2015 +0200

    sorting: Fix compile-time warning

 gom/gom-sorting.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gom/gom-sorting.c b/gom/gom-sorting.c
index ee5ef2a..879b338 100644
--- a/gom/gom-sorting.c
+++ b/gom/gom-sorting.c
@@ -49,7 +49,7 @@ gom_sorting_finalize (GObject *object)
    GomSortingPrivate *priv = GOM_SORTING(object)->priv;
 
    if (priv->order_by_terms != NULL)
-      g_queue_free_full(priv->order_by_terms, gom_order_by_term_free);
+      g_queue_free_full(priv->order_by_terms, (GDestroyNotify) gom_order_by_term_free);
 
    G_OBJECT_CLASS(gom_sorting_parent_class)->finalize(object);
 }