[gegl] configure: bump babl requirement to 0.1.16

[Øyvind Kolås <ok src gnome org>]

commit 0a7cfada9b60c82aaec05c0b47a670a6823c5172
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Feb 12 15:30:04 2016 +0100

    configure: bump babl requirement to 0.1.16

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 03f2308..624497f 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], [0.1.14])
+m4_define([babl_required_version], [0.1.16])
 m4_define([cairo_required_version], [0.0.0])
 m4_define([gdk_pixbuf_required_version], [2.18.0])
 m4_define([introspection_required_version], [1.32.0])