[gnome-control-center] shell: add a autocleanup function to CcPanel

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 61d7abe795b4434fd1ae3d28aed8b9d86180bba3
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Jun 14 14:54:03 2016 -0300

    shell: add a autocleanup function to CcPanel
    
    CcPanel uses the old boilerplate code from GLib,
    which does not set an autocleanup function.
    
    The lack of a cleanup function implies that panels
    cannot use G_DECLARE_{FINAL,DERIVABLE}_TYPE, making
    the code stick to the old boilerplate.
    
    This patch adds a cleanup function to CcPanel. It doesn't
    move CcPanel to G_DECLARE_DERIVABLE_TYPE() because it'd
    break the CcPanel's subclasses.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769063

 shell/cc-panel.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/shell/cc-panel.h b/shell/cc-panel.h
index ef77e91..6253d27 100644
--- a/shell/cc-panel.h
+++ b/shell/cc-panel.h
@@ -50,6 +50,8 @@ typedef struct CcPanelPrivate CcPanelPrivate;
 typedef struct _CcPanel       CcPanel;
 typedef struct _CcPanelClass  CcPanelClass;
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (CcPanel, g_object_unref)
+
 /* cc-shell.h requires CcPanel, so make sure it is defined first */
 #include "cc-shell.h"