[gimp] Use gimp_image_undo_is_enabled() instead of private->undo_freeze_count

[Michael Natterer <mitch src gnome org>]

commit 4211524ee2c6077d96ca0d584efbc46e51651657
Author: Michael Natterer <mitch gimp org>
Date:   Fri Feb 5 09:19:43 2010 +0100

    Use gimp_image_undo_is_enabled() instead of private->undo_freeze_count

 app/file/file-open.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/app/file/file-open.c b/app/file/file-open.c
index eb4359b..2842e26 100644
--- a/app/file/file-open.c
+++ b/app/file/file-open.c
@@ -52,7 +52,6 @@
 #include "core/gimpdocumentlist.h"
 #include "core/gimpimage.h"
 #include "core/gimpimage-merge.h"
-#include "core/gimpimage-private.h" /* FIXME: add api for undo freeze count */
 #include "core/gimpimage-undo.h"
 #include "core/gimpimagefile.h"
 #include "core/gimplayer.h"
@@ -601,7 +600,7 @@ file_open_sanitize_image (GimpImage *image,
   gimp_image_undo_free (image);
 
   /* make sure that undo is enabled */
-  while (GIMP_IMAGE_GET_PRIVATE (image)->undo_freeze_count)
+  while (! gimp_image_undo_is_enabled (image))
     gimp_image_undo_thaw (image);
 
   /* Set the image to clean. Note that export dirtiness is not set to