[gegl] recursive-transform: watch gegl:opacity child nodes

[Ell <ell src gnome org>]

commit 190a81b4a7c70c208ec624bdc5187b003d2e4774
Author: Ell <ell_se yahoo com>
Date:   Sun Jun 3 17:57:07 2018 -0400

    recursive-transform: watch gegl:opacity child nodes

 operations/common/recursive-transform.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/operations/common/recursive-transform.c b/operations/common/recursive-transform.c
index 8ec04964f..3dd29a8ad 100644
--- a/operations/common/recursive-transform.c
+++ b/operations/common/recursive-transform.c
@@ -218,6 +218,7 @@ attach (GeglOperation *operation)
       gegl_operation_meta_watch_nodes (operation,
                                        iters[i].transform_node,
                                        iters[i].color_overlay_node,
+                                       iters[i].opacity_node,
                                        iters[i].over_node,
                                        NULL);
     }