[gtk+/portal] Clean up choices in finalize

[Matthias Clasen <matthiasc src gnome org>]

commit 9ed26abe3df6d9ca4cd20c49880007dcf7d48ed5
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jul 6 21:01:41 2016 -0400

    Clean up choices in finalize
    
    This omission was pointed out by Cosimo.

 gtk/gtkfilechooserwidget.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkfilechooserwidget.c b/gtk/gtkfilechooserwidget.c
index 3d995c0..943a98e 100644
--- a/gtk/gtkfilechooserwidget.c
+++ b/gtk/gtkfilechooserwidget.c
@@ -682,6 +682,9 @@ gtk_file_chooser_widget_finalize (GObject *object)
   GtkFileChooserWidget *impl = GTK_FILE_CHOOSER_WIDGET (object);
   GtkFileChooserWidgetPrivate *priv = impl->priv;
 
+  if (priv->choices)
+    g_hash_table_unref (priv->choices);
+
   if (priv->location_changed_id > 0)
     g_source_remove (priv->location_changed_id);