[gimp] Bug 794753 - do not dither image mask and channels for imported images

[N/A <ell src gnome org>]

commit 3265797f3e057f8411cefc015954969fbe5e2fdf
Author: Ell <ell_se yahoo com>
Date:   Thu Mar 29 03:03:51 2018 -0400

    Bug 794753 - do not dither image mask and channels for imported images
    
    By the same logic of commit
    44f293bcdb241f49b22a8df00d7f90f350f24005, we shouldn't dither the
    alpha channel either.

 app/core/gimpimage-convert-precision.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/app/core/gimpimage-convert-precision.c b/app/core/gimpimage-convert-precision.c
index 3cfd1bb..41579e2 100644
--- a/app/core/gimpimage-convert-precision.c
+++ b/app/core/gimpimage-convert-precision.c
@@ -248,12 +248,11 @@ gimp_image_convert_dither_u8 (GimpImage    *image,
 
   dither = gegl_node_new_child (NULL,
                                 "operation", "gegl:noise-rgb",
-                                "red",      1.0 / 256.0,
-                                "green",    1.0 / 256.0,
-                                "blue",     1.0 / 256.0,
-                                "alpha",    1.0 / 256.0,
-                                "linear",   FALSE,
-                                "gaussian", FALSE,
+                                "red",       1.0 / 256.0,
+                                "green",     1.0 / 256.0,
+                                "blue",      1.0 / 256.0,
+                                "linear",    FALSE,
+                                "gaussian",  FALSE,
                                 NULL);
 
   if (dither)