[gegl] checkerboard: set boolean indicating that the op does opencl

[Øyvind Kolås <ok src gnome org>]

commit a66c1d55208de81d2c0021c4d3c7f7bccb4fe5ad
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Oct 12 00:27:53 2017 +0200

    checkerboard: set boolean indicating that the op does opencl

 operations/common/checkerboard.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common/checkerboard.c b/operations/common/checkerboard.c
index 70b0fc6..93bde57 100644
--- a/operations/common/checkerboard.c
+++ b/operations/common/checkerboard.c
@@ -339,6 +339,7 @@ gegl_op_class_init (GeglOpClass *klass)
   source_class->process = operation_source_process;
   operation_class->get_bounding_box = get_bounding_box;
   operation_class->prepare = prepare;
+  operation_class->opencl_support = TRUE;
 
   gegl_operation_class_set_keys (operation_class,
     "name",               "gegl:checkerboard",