[gtk+] spinbutton: Free the gadget in finalize

[Timm Bäder <baedert src gnome org>]

commit c44364f1d1a0295034e7c59afdcf49870334f785
Author: Timm Bäder <mail baedert org>
Date:   Wed Feb 10 12:30:35 2016 +0100

    spinbutton: Free the gadget in finalize

 gtk/gtkspinbutton.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index e76a1e7..59215aa 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -852,6 +852,7 @@ gtk_spin_button_finalize (GObject *object)
   GtkSpinButtonPrivate *priv = spin_button->priv;
 
   gtk_spin_button_unset_adjustment (spin_button);
+  g_clear_object (&priv->gadget);
 
   g_object_unref (priv->swipe_gesture);