[gegl] gegl:photocopy: opt out of auto-threading

[Thomas Manni <tmanni src gnome org>]

commit 17e37492fbeb5f4760aedad21d5681701233e9be
Author: Thomas Manni <thomas manni free fr>
Date:   Fri Aug 25 13:23:59 2017 +0200

    gegl:photocopy: opt out of auto-threading

 operations/common/photocopy.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common/photocopy.c b/operations/common/photocopy.c
index ad34123..9e6c024 100644
--- a/operations/common/photocopy.c
+++ b/operations/common/photocopy.c
@@ -319,6 +319,7 @@ gegl_op_class_init (GeglOpClass *klass)
   operation_class->prepare                 = prepare;
   operation_class->get_required_for_output = get_required_for_output;
   operation_class->get_cached_region       = get_cached_region;
+  operation_class->threaded                = FALSE;
   filter_class->process                    = process;
 
   gegl_operation_class_set_keys (operation_class,