[gegl] gblur-1d: propagate BablSpace

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

commit a05914704a85c12a75a6b111e711d6c1e69325fb
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Jul 5 15:52:38 2018 +0200

    gblur-1d: propagate BablSpace

 operations/common/gblur-1d.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/gblur-1d.c b/operations/common/gblur-1d.c
index 254cfa0fa..d502fafba 100644
--- a/operations/common/gblur-1d.c
+++ b/operations/common/gblur-1d.c
@@ -933,6 +933,7 @@ filter_disambiguation (GeglGblur1dFilter filter,
 static void
 gegl_gblur_1d_prepare (GeglOperation *operation)
 {
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
   GeglProperties *o = GEGL_PROPERTIES (operation);
   const Babl *src_format = gegl_operation_get_source_format (operation, "input");
   const char *format     = "RaGaBaA float";
@@ -965,8 +966,8 @@ gegl_gblur_1d_prepare (GeglOperation *operation)
         }
     }
 
-  gegl_operation_set_format (operation, "input", babl_format (format));
-  gegl_operation_set_format (operation, "output", babl_format (format));
+  gegl_operation_set_format (operation, "input", babl_format_with_space (format, space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space (format, space));
 }
 
 static GeglRectangle