[gegl] configure: require babl>=0.1.32

[Øyvind Kolås <ok src gnome org>]

commit 5d5991627df3d75d32b05931757c99c1c277b1a6
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Oct 3 17:21:13 2017 +0200

    configure: require babl>=0.1.32
    
    Bumping the requirement, no babl api we rely on has changed - but there is
    minuted differences in some other computations of color that affect one
    perceptual difference test that has been updated - as well as  many bit-level
    hashes of outputs.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8e93c5b..f758485 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], [0.1.30])
+m4_define([babl_required_version], [0.1.32])
 m4_define([cairo_required_version], [0.0.0])
 m4_define([exiv2_required_version], [0.25])
 m4_define([gdk_pixbuf_required_version], [2.32.0])