[gegl] newsprint: use a custom testing graph

[Øyvind Kolås <ok src gnome org>]

commit f016c61d97f4545ff4f0275d21ccfa1d612c85e5
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue May 2 23:13:53 2017 +0200

    newsprint: use a custom testing graph

 operations/common/newsprint.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/newsprint.c b/operations/common/newsprint.c
index c6f75ca..8da0e20 100644
--- a/operations/common/newsprint.c
+++ b/operations/common/newsprint.c
@@ -536,9 +536,9 @@ gegl_op_class_init (GeglOpClass *klass)
     "title",              _("Newsprint"),
     "position-dependent", "true",
     "categories" ,        "render",
-    "reference-hash",     "258468fa2e551453db67ba80c5db326f",
+    "reference-hash",     "f680e099d412e28dfa26f9b19e34109f",
     "description",        _("Digital halftoning with optional modulations. "),
-    "reference-chain",    "load path=standard-input.png newsprint period=4.0",
+    "reference-chain",    "load path=images/standard-input.png newsprint period=6.0 pattern=pssquare 
color-model=cmyk",
     "position-dependent", "true",
     NULL);
 }