[gegl] gegl:color-enhance: opt out of auto-threading

[Thomas Manni <tmanni src gnome org>]

commit 08a57176ef163cecd53843231c4b9974c2b9570b
Author: Thomas Manni <thomas manni free fr>
Date:   Fri Aug 25 04:04:15 2017 +0200

    gegl:color-enhance: opt out of auto-threading

 operations/common/color-enhance.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common/color-enhance.c b/operations/common/color-enhance.c
index a148bbd..92f22ae 100644
--- a/operations/common/color-enhance.c
+++ b/operations/common/color-enhance.c
@@ -266,6 +266,7 @@ gegl_op_class_init (GeglOpClass *klass)
   operation_class->get_required_for_output = get_required_for_output;
   operation_class->get_cached_region = get_cached_region;
   operation_class->opencl_support = FALSE;
+  operation_class->threaded = FALSE;
 
   gegl_operation_class_set_keys (operation_class,
     "name",        "gegl:color-enhance",