[gegl] grey: update reference hash

[Øyvind Kolås <ok src gnome org>]

commit d8ef620c32c751086dc875cefb2b12b9f5ef6d53
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Nov 11 21:31:40 2017 +0100

    grey: update reference hash

 operations/common/grey.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/grey.c b/operations/common/grey.c
index 7a06021..4e99bee 100644
--- a/operations/common/grey.c
+++ b/operations/common/grey.c
@@ -142,7 +142,7 @@ gegl_op_class_init (GeglOpClass *klass)
       "compat-name", "gegl:grey",
       "title",       _("Make Grey"),
       "categories" , "grayscale:color",
-      "reference-hash", "43ddd80572ab34095298ac7c36368b0c",
+      "reference-hash", "a101c74702f52e4bd2fda04eda56034e",
       "description", _("Turns the image grayscale"),
       NULL);
 }