[gimp] Fix finalize() so it doesn't crash

[Michael Natterer <mitch src gnome org>]

commit c8c6d77c3584c306de4d00a526df488d87e4c027
Author: Michael Natterer <mitch gimp org>
Date:   Mon Aug 24 17:30:41 2009 +0200

    Fix finalize() so it doesn't crash

 app/core/gimpgrouplayer.c |   15 +++++++++------
 1 files changed, 9 insertions(+), 6 deletions(-)
---
diff --git a/app/core/gimpgrouplayer.c b/app/core/gimpgrouplayer.c
index 6e1d5e3..e879f87 100644
--- a/app/core/gimpgrouplayer.c
+++ b/app/core/gimpgrouplayer.c
@@ -227,12 +227,6 @@ gimp_group_layer_finalize (GObject *object)
 {
   GimpGroupLayer *group = GIMP_GROUP_LAYER (object);
 
-  if (group->projection)
-    {
-      g_object_unref (group->projection);
-      group->projection = NULL;
-    }
-
   if (group->children)
     {
       g_signal_handlers_disconnect_by_func (group->children,
@@ -241,11 +235,20 @@ gimp_group_layer_finalize (GObject *object)
       g_signal_handlers_disconnect_by_func (group->children,
                                             gimp_group_layer_child_remove,
                                             group);
+      g_signal_handlers_disconnect_by_func (group->children,
+                                            gimp_group_layer_stack_update,
+                                            group);
 
       g_object_unref (group->children);
       group->children = NULL;
     }
 
+  if (group->projection)
+    {
+      g_object_unref (group->projection);
+      group->projection = NULL;
+    }
+
   G_OBJECT_CLASS (parent_class)->finalize (object);
 }