[gimp] Make getting items by tattoo work on trees

[Michael Natterer <mitch src gnome org>]

commit 227076b6d1eb8ff2e316f064cd7ad65f5ff9439c
Author: Michael Natterer <mitch gimp org>
Date:   Sun Aug 2 00:15:53 2009 +0200

    Make getting items by tattoo work on trees

 app/core/gimpimage.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/app/core/gimpimage.c b/app/core/gimpimage.c
index 841732e..780bd46 100644
--- a/app/core/gimpimage.c
+++ b/app/core/gimpimage.c
@@ -2918,10 +2918,21 @@ gimp_image_get_item_by_tattoo (GimpContainer *items,
 
   for (list = GIMP_LIST (items)->list; list; list = g_list_next (list))
     {
-      GimpItem *item = list->data;
+      GimpItem      *item = list->data;
+      GimpContainer *children;
 
       if (gimp_item_get_tattoo (item) == tattoo)
         return item;
+
+      children = gimp_viewable_get_children (GIMP_VIEWABLE (item));
+
+      if (children)
+        {
+          item = gimp_image_get_item_by_tattoo (children, tattoo);
+
+          if (item)
+            return item;
+        }
     }
 
   return NULL;