[gegl] spherize: provide implementation for get_invalidated_by_change()

[N/A <ell src gnome org>]

commit d4ee27fdb00fb3bb69e23a8b2aad6da1aa773bbf
Author: Ell <ell_se yahoo com>
Date:   Sun Oct 1 15:23:49 2017 -0400

    spherize: provide implementation for get_invalidated_by_change()

 operations/workshop/spherize.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/operations/workshop/spherize.c b/operations/workshop/spherize.c
index e5339e4..61bf3dc 100644
--- a/operations/workshop/spherize.c
+++ b/operations/workshop/spherize.c
@@ -288,9 +288,10 @@ gegl_op_class_init (GeglOpClass *klass)
   operation_class = GEGL_OPERATION_CLASS (klass);
   filter_class    = GEGL_OPERATION_FILTER_CLASS (klass);
 
-  operation_class->prepare                 = prepare;
-  operation_class->get_required_for_output = get_required_for_output;
-  operation_class->process                 = parent_process;
+  operation_class->prepare                   = prepare;
+  operation_class->get_invalidated_by_change = get_required_for_output;
+  operation_class->get_required_for_output   = get_required_for_output;
+  operation_class->process                   = parent_process;
 
   filter_class->process                    = process;