[gimp/gimp-2-10] app: mark REPLACE and PASS_THROUGH modes as trivial

[Ell <ell src gnome org>]

commit 03a4fafe30ef354b6653fb9bea99610f8c83d6fd
Author: Ell <ell_se yahoo com>
Date:   Mon Dec 3 09:51:15 2018 -0500

    app: mark REPLACE and PASS_THROUGH modes as trivial
    
    (cherry picked from commit f508ec8b894bf1cac4b632667581e28de7c17ad1)

 app/operations/layer-modes/gimp-layer-modes.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/app/operations/layer-modes/gimp-layer-modes.c b/app/operations/layer-modes/gimp-layer-modes.c
index d113ba7488..a6f198dc1c 100644
--- a/app/operations/layer-modes/gimp-layer-modes.c
+++ b/app/operations/layer-modes/gimp-layer-modes.c
@@ -813,8 +813,9 @@ static const GimpLayerModeInfo layer_mode_infos[] =
   { GIMP_LAYER_MODE_PASS_THROUGH,
 
     .op_name              = "gimp:pass-through",
-    .flags                = GIMP_LAYER_MODE_FLAG_BLEND_SPACE_IMMUTABLE |
-                            GIMP_LAYER_MODE_FLAG_COMPOSITE_MODE_IMMUTABLE,
+    .flags                = GIMP_LAYER_MODE_FLAG_BLEND_SPACE_IMMUTABLE    |
+                            GIMP_LAYER_MODE_FLAG_COMPOSITE_MODE_IMMUTABLE |
+                            GIMP_LAYER_MODE_FLAG_TRIVIAL,
     .context              = GIMP_LAYER_MODE_CONTEXT_GROUP,
     .composite_mode       = GIMP_LAYER_COMPOSITE_UNION,
     .composite_space      = GIMP_LAYER_COLOR_SPACE_RGB_LINEAR
@@ -823,7 +824,8 @@ static const GimpLayerModeInfo layer_mode_infos[] =
   { GIMP_LAYER_MODE_REPLACE,
 
     .op_name              = "gimp:replace",
-    .flags                = GIMP_LAYER_MODE_FLAG_BLEND_SPACE_IMMUTABLE,
+    .flags                = GIMP_LAYER_MODE_FLAG_BLEND_SPACE_IMMUTABLE |
+                            GIMP_LAYER_MODE_FLAG_TRIVIAL,
     .context              = GIMP_LAYER_MODE_CONTEXT_FADE,
     .paint_composite_mode = GIMP_LAYER_COMPOSITE_UNION,
     .composite_mode       = GIMP_LAYER_COMPOSITE_UNION,