[gegl] emboss: update reference-hash, opt out of autothreading

[Øyvind Kolås <ok src gnome org>]

commit abf335c1f58d055e89a15a750809aa900200ccc1
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Oct 12 18:54:02 2017 +0200

    emboss: update reference-hash, opt out of autothreading
    
    Emboss causes the wrong result when auto-threaded, for now opting out of
    autothreading thus making it deterministic. Added a XXX comment indicating
    that this is a bug.

 operations/common-gpl3+/emboss.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/operations/common-gpl3+/emboss.c b/operations/common-gpl3+/emboss.c
index 5eb9c23..97ed948 100644
--- a/operations/common-gpl3+/emboss.c
+++ b/operations/common-gpl3+/emboss.c
@@ -261,11 +261,12 @@ gegl_op_class_init (GeglOpClass *klass)
 
   filter_class->process    = process;
   operation_class->prepare = prepare;
+  operation_class->threaded = FALSE; // XXX: docs operation test yields horizontal stripe on division
 
   gegl_operation_class_set_keys (operation_class,
     "name",        "gegl:emboss",
     "title",       _("Emboss"),
-    "reference-hash", "9dcee11a194ac61c64a7d1cafaa1f34f",
+    "reference-hash", "6866ddbaf3d44665ae2a2aa8b43a6451",
     "categories",  "light",
     "license",     "GPL3+",
     "description", _("Simulates an image created by embossing"),