[gimp] gimp_item_real_duplicate(): don't set lock-content if it can't be set

[Michael Natterer <mitch src gnome org>]

commit 45f05b272c812a940cd844671d5b50d9116a0552
Author: Michael Natterer <mitch gimp org>
Date:   Tue Sep 8 22:09:53 2009 +0200

    gimp_item_real_duplicate(): don't set lock-content if it can't be set
    
    Also use the proper APIs to set visible, linked and lock-content
    instead of accessing the item struct directly.

 app/core/gimpitem.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/app/core/gimpitem.c b/app/core/gimpitem.c
index d8d4bb1..ca7cfb2 100644
--- a/app/core/gimpitem.c
+++ b/app/core/gimpitem.c
@@ -448,9 +448,12 @@ gimp_item_real_duplicate (GimpItem *item,
   g_object_unref (new_item->parasites);
   new_item->parasites = gimp_parasite_list_copy (item->parasites);
 
-  new_item->visible      = gimp_item_get_visible (item);
-  new_item->linked       = gimp_item_get_linked (item);
-  new_item->lock_content = gimp_item_get_lock_content (item);
+  gimp_item_set_visible (new_item, gimp_item_get_visible (item), FALSE);
+  gimp_item_set_linked  (new_item, gimp_item_get_linked (item),  FALSE);
+
+  if (gimp_item_can_lock_content (new_item))
+    gimp_item_set_lock_content (new_item, gimp_item_get_lock_content (item),
+                                FALSE);
 
   return new_item;
 }