[gegl] noise-hurl: use babl_model_is

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

commit f801a01fa89568c087b66478f4abe4ca93def589
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Jul 11 23:44:48 2018 +0200

    noise-hurl: use babl_model_is

 operations/common/noise-hurl.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/operations/common/noise-hurl.c b/operations/common/noise-hurl.c
index 3146d4c40..81b453d89 100644
--- a/operations/common/noise-hurl.c
+++ b/operations/common/noise-hurl.c
@@ -58,10 +58,12 @@ prepare (GeglOperation *operation)
 
   if (input_format)
     {
-      if (babl_format_get_model (input_format) == babl_model ("Y'") ||
-          babl_format_get_model (input_format) == babl_model ("Y'A") ||
-          babl_format_get_model (input_format) == babl_model ("Y") ||
-          babl_format_get_model (input_format) == babl_model ("YA"))
+      const Babl *model = babl_format_get_model (input_format);
+
+      if (babl_model_is (model, "Y'") ||
+          babl_model_is (model, "Y'A") ||
+          babl_model_is (model, "Y") ||
+          babl_model_is (model, "YA"))
         o->user_data = (void*)0x1;
 
       /* a bit hacky, signaling of data being grayscale data and only