[gegl] invert-gamma: propagate BablSpace

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

commit bd72b1f4103ae7d9658791a337f769aa5a827971
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Jul 5 20:15:00 2018 +0200

    invert-gamma: propagate BablSpace

 operations/common/invert-gamma.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/invert-gamma.c b/operations/common/invert-gamma.c
index dce4630aa..c618762cb 100644
--- a/operations/common/invert-gamma.c
+++ b/operations/common/invert-gamma.c
@@ -35,8 +35,9 @@
 static void
 prepare (GeglOperation *operation)
 {
-  gegl_operation_set_format (operation, "input", babl_format ("R'G'B'A float"));
-  gegl_operation_set_format (operation, "output", babl_format ("R'G'B'A float"));
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
+  gegl_operation_set_format (operation, "input", babl_format_with_space ("R'G'B'A float", space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space ("R'G'B'A float", space));
 }
 
 static gboolean