[gimp] app: add missing change to last commit

[Ell <ell src gnome org>]

commit 24731851e44fdae97d2250d8504ac56a3413e545
Author: Ell <ell_se yahoo com>
Date:   Sat Sep 28 11:34:44 2019 +0300

    app: add missing change to last commit

 app/core/gimpimage-private.h | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/app/core/gimpimage-private.h b/app/core/gimpimage-private.h
index c7894a591a..a2ae25691c 100644
--- a/app/core/gimpimage-private.h
+++ b/app/core/gimpimage-private.h
@@ -51,6 +51,8 @@ struct _GimpImagePrivate
 
   gint               show_all;              /*  render full image content    */
   GeglRectangle      bounding_box;          /*  image content bounding box   */
+  gint               bounding_box_freeze_count;
+  gboolean           bounding_box_update_pending;
   GeglBuffer        *pickable_buffer;
 
   guchar            *colormap;              /*  colormap (for indexed)       */