[gimp] app: properly memory manage GimpColorSelectorPalette's context

[Michael Natterer <mitch src gnome org>]

commit a25bfabc43f8546542cdbfe3f7fc57e598c9c478
Author: Michael Natterer <mitch gimp org>
Date:   Sun Dec 11 02:44:14 2011 +0100

    app: properly memory manage GimpColorSelectorPalette's context
    
    so we don't access garbage pointers when the widget is moved between
    docks, like when toggling SWM.

 app/widgets/gimpcolorselectorpalette.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimpcolorselectorpalette.c b/app/widgets/gimpcolorselectorpalette.c
index 8a02b9b..d0160d2 100644
--- a/app/widgets/gimpcolorselectorpalette.c
+++ b/app/widgets/gimpcolorselectorpalette.c
@@ -123,6 +123,10 @@ gimp_color_selector_palette_set_config (GimpColorSelector *selector,
       g_signal_handlers_disconnect_by_func (select->context,
                                             gimp_color_selector_palette_palette_changed,
                                             select);
+      gimp_view_renderer_set_context (GIMP_VIEW (select->view)->renderer,
+                                      NULL);
+
+      g_object_unref (select->context);
       select->context = NULL;
     }
 
@@ -131,6 +135,8 @@ gimp_color_selector_palette_set_config (GimpColorSelector *selector,
 
   if (select->context)
     {
+      g_object_ref (select->context);
+
       if (! select->view)
         {
           GtkWidget *frame;
@@ -159,6 +165,11 @@ gimp_color_selector_palette_set_config (GimpColorSelector *selector,
                             G_CALLBACK (gimp_color_selector_palette_entry_clicked),
                             select);
         }
+      else
+        {
+          gimp_view_renderer_set_context (GIMP_VIEW (select->view)->renderer,
+                                          select->context);
+        }
 
       g_signal_connect_object (select->context, "palette-changed",
                                G_CALLBACK (gimp_color_selector_palette_palette_changed),