[gegl] gegl:matting-levin: opt out of auto-threading

[Thomas Manni <tmanni src gnome org>]

commit 9217d8e4993804a19e4673df5a609b235cdaa288
Author: Thomas Manni <thomas manni free fr>
Date:   Sat Aug 26 11:06:37 2017 +0200

    gegl:matting-levin: opt out of auto-threading

 operations/external/matting-levin.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/external/matting-levin.c b/operations/external/matting-levin.c
index 898394e..b2bd87e 100644
--- a/operations/external/matting-levin.c
+++ b/operations/external/matting-levin.c
@@ -1448,6 +1448,7 @@ gegl_op_class_init (GeglOpClass *klass)
   operation_class->prepare                 = matting_prepare;
   operation_class->get_required_for_output = matting_get_required_for_output;
   operation_class->get_cached_region       = matting_get_cached_region;
+  operation_class->threaded                = FALSE;
 
   gegl_operation_class_set_keys (operation_class,
   "name",         "gegl:matting-levin",