[gimp] plug-ins: replace deprecated enum values in py-slice plug-in

[Thomas Manni <tmanni src gnome org>]

commit f981f83fbc30772cfad7a315de734fbde1ed303f
Author: Thomas Manni <thomas manni free fr>
Date:   Mon Apr 17 11:31:24 2017 +0200

    plug-ins: replace deprecated enum values in py-slice plug-in

 plug-ins/pygimp/plug-ins/py-slice.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/pygimp/plug-ins/py-slice.py b/plug-ins/pygimp/plug-ins/py-slice.py
index 13ae267..c4f198f 100755
--- a/plug-ins/pygimp/plug-ins/py-slice.py
+++ b/plug-ins/pygimp/plug-ins/py-slice.py
@@ -173,7 +173,8 @@ def slice(image, drawable, image_path, image_basename, image_extension,
     temp_image.disable_undo()
     temp_image.crop(right - left, bottom - top, left, top)
     if image_extension == "gif" and image.base_type == RGB:
-        pdb.gimp_image_convert_indexed (temp_image,NO_DITHER, MAKE_PALETTE, 255,
+        pdb.gimp_image_convert_indexed (temp_image, CONVERT_DITHER_NONE,
+                                        CONVERT_PALETTE_GENERATE, 255,
                                         True, False, False)
     if image_extension == "jpg" and image.base_type == INDEXED:
         pdb.gimp_image_convert_rgb (temp_image)