[gegl] vignette: propagate BablSpace

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

commit 16a497ea60eae8412efb488e7c2408d58f91a3c8
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Jul 5 22:34:18 2018 +0200

    vignette: propagate BablSpace

 operations/common/vignette.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/vignette.c b/operations/common/vignette.c
index a3ab0e11b..1ef571da1 100644
--- a/operations/common/vignette.c
+++ b/operations/common/vignette.c
@@ -85,8 +85,9 @@ property_double (rotation, _("Rotation"), 0.0)
 static void
 prepare (GeglOperation *operation)
 {
-  gegl_operation_set_format (operation, "input", babl_format ("RaGaBaA float"));
-  gegl_operation_set_format (operation, "output", babl_format ("RaGaBaA float"));
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
+  gegl_operation_set_format (operation, "input", babl_format_with_space ("RaGaBaA float", space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space ("RaGaBaA float", space));
 }
 
 /* conversion function mapping between scale and aspect