[gegl] exposure: do a 1.5stop overexposure as example image

[Øyvind Kolås <ok src gnome org>]

commit 415ebc0ef04553101d8d597d2b0309c8822d2b7d
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed May 3 02:30:40 2017 +0200

    exposure: do a 1.5stop overexposure as example image

 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 a8b97a8..8284d40 100644
--- a/operations/common/exposure.c
+++ b/operations/common/exposure.c
@@ -180,6 +180,7 @@ gegl_op_class_init (GeglOpClass *klass)
     "name",        "gegl:exposure",
     "title",       _("Exposure"),
     "categories",  "color",
+    "reference-chain", "load path=images/standard-input.png exposure exposure=1.5",
     "description", _("Changes Exposure of an image, allows stepping HDR and photographs up/down in stops. "),
     "op-version",  "1:0",
     NULL);