[gegl] exposure: hook up prepare implementation

[Ãyvind KolÃs <ok src gnome org>]

commit 47f9d57bfa6dd67aff7177a833261ac3ddf16ec6
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Wed Jan 30 10:52:43 2013 +1100

    exposure: hook up prepare implementation

 operations/common/exposure.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common/exposure.c b/operations/common/exposure.c
index fdac232..b586e4f 100644
--- a/operations/common/exposure.c
+++ b/operations/common/exposure.c
@@ -171,6 +171,7 @@ gegl_chant_class_init (GeglChantClass *klass)
   point_filter_class->cl_process = cl_process;
 
   operation_class->opencl_support = TRUE;
+  operation_class->prepare = prepare;
 
   gegl_operation_class_set_keys (operation_class,
     "name"       , "gegl:exposure",