[gegl] configure: depend on babl-0.1.41

[Øyvind Kolås <ok src gnome org>]

commit 30d803bbcb12434f856d35b9b37d32601a209df1
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Jan 20 18:47:54 2018 +0100

    configure: depend on babl-0.1.41
    
    We do not want to depend on the release, babl-0.1.42 will be out by the
    coming GEGL release though with a fix for a sometimes critical issue.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 41b45ab..d231f78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ m4_define([gegl_stable],
 m4_define([gimp_full_name], [Generic Graphical Library])
 
 # required versions of external libraries
-m4_define([babl_required_version], [0.1.40])
+m4_define([babl_required_version], [0.1.41])
 m4_define([cairo_required_version], [1.12.2])
 m4_define([exiv2_required_version], [0.25])
 m4_define([gdk_pixbuf_required_version], [2.32.0])