[gnome-software] trivial: Fix warning about type passed to gtk_widget_destroy

[Robert Ancell <rancell src gnome org>]

commit e8cfba491445efd6953b229c85622b77b25ece4c
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Feb 11 09:20:49 2016 +1300

    trivial: Fix warning about type passed to gtk_widget_destroy

 src/gs-review-dialog.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-review-dialog.c b/src/gs-review-dialog.c
index 86e8ede..e86f0df 100644
--- a/src/gs-review-dialog.c
+++ b/src/gs-review-dialog.c
@@ -165,7 +165,7 @@ gs_review_row_dispose (GObject *object)
        GsReviewDialog *dialog = GS_REVIEW_DIALOG (object);
        if (dialog->timer_id > 0)
                g_source_remove (dialog->timer_id);
-       gtk_widget_destroy (dialog->spell_checker);
+       gtk_widget_destroy (GTK_WIDGET (dialog->spell_checker));
        G_OBJECT_CLASS (gs_review_dialog_parent_class)->dispose (object);
 }