[gegl] gegl: add back stubs for gegl_operation_meta_watch*

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 7a00a24d43a9eb2b98d82d64c19cf8937224517f
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed May 20 18:20:11 2020 +0200

    gegl: add back stubs for gegl_operation_meta_watch*
    
    These do nothing, by having the stub there the code continues working
    but warns at both compile and run-time.

 gegl/operation/gegl-operation-meta.c | 16 ++++++++++++++++
 gegl/operation/gegl-operation-meta.h | 13 +++++++++++++
 2 files changed, 29 insertions(+)
---
diff --git a/gegl/operation/gegl-operation-meta.c b/gegl/operation/gegl-operation-meta.c
index 4af2d2df1..15d1c5749 100644
--- a/gegl/operation/gegl-operation-meta.c
+++ b/gegl/operation/gegl-operation-meta.c
@@ -72,3 +72,19 @@ gegl_operation_meta_redirect (GeglOperation *operation,
   GeglOperation *internal_operation = gegl_node_get_gegl_operation (internal);
   g_object_bind_property (operation, name, internal_operation, internal_name, G_BINDING_SYNC_CREATE);
 }
+
+void
+gegl_operation_meta_watch_node (GeglOperation     *operation,
+                                GeglNode          *node)
+{
+  g_warning ("%s does nothing\n", __FUNCTION__);
+}
+
+G_DEPRECATED
+void
+gegl_operation_meta_watch_nodes (GeglOperation     *operation,
+                                 GeglNode          *node,
+                                 ...)
+{
+  g_warning ("%s does nothing\n", __FUNCTION__);
+}
diff --git a/gegl/operation/gegl-operation-meta.h b/gegl/operation/gegl-operation-meta.h
index b849af88f..ab3e2e851 100644
--- a/gegl/operation/gegl-operation-meta.h
+++ b/gegl/operation/gegl-operation-meta.h
@@ -60,6 +60,19 @@ void  gegl_operation_meta_redirect         (GeglOperation     *operation,
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (GeglOperationMeta, g_object_unref)
 
+G_DEPRECATED
+void  gegl_operation_meta_watch_node       (GeglOperation     *operation,
+                                            GeglNode          *node);
+
+G_DEPRECATED
+void  gegl_operation_meta_watch_nodes      (GeglOperation     *operation,
+                                            GeglNode          *node,
+                                            ...) G_GNUC_NULL_TERMINATED;
+
+
+
+
+
 G_END_DECLS
 
 #endif