[babl] babl: silence missing path warning

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

commit f3ec945fe7a7bf51ff45c6ad41051ee970878359
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Aug 28 01:37:07 2018 +0200

    babl: silence missing path warning

 babl/babl-fish-path.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/babl/babl-fish-path.c b/babl/babl-fish-path.c
index 2e87268..71f584d 100644
--- a/babl/babl-fish-path.c
+++ b/babl/babl-fish-path.c
@@ -627,7 +627,10 @@ babl_fish_path2 (const Babl *source,
       babl_free (babl);
       babl_mutex_unlock (babl_format_mutex);
 
-      _babl_fish_missing_fast_path_warning (source, destination);
+      /* it is legitimate for reference paths to be faster than long chains
+         of paths, thus it is time to retire this warning. XXX: remove it fully 
+
+          _babl_fish_missing_fast_path_warning (source, destination); */
 
       return NULL;
     }