[gimp] build, app: require babl-0.1.68 or newer

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

commit 23ade7b80bf8e2720f5d5136893a41b647169587
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Jul 25 15:10:22 2019 +0200

    build, app: require babl-0.1.68 or newer

 app/sanity.c | 2 +-
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/sanity.c b/app/sanity.c
index 1562829915..03d1ecd018 100644
--- a/app/sanity.c
+++ b/app/sanity.c
@@ -480,7 +480,7 @@ sanity_check_babl (void)
 
 #define BABL_REQUIRED_MAJOR 0
 #define BABL_REQUIRED_MINOR 1
-#define BABL_REQUIRED_MICRO 66
+#define BABL_REQUIRED_MICRO 68
 
   babl_get_version (&babl_major_version,
                     &babl_minor_version,
diff --git a/configure.ac b/configure.ac
index 5031b27f14..750bf37adf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,7 @@ m4_define([gimp_full_name], [GNU Image Manipulation Program])
 m4_define([alsa_required_version], [1.0.0])
 m4_define([appstream_glib_required_version], [0.7.7])
 m4_define([atk_required_version], [2.4.0])
-m4_define([babl_required_version], [0.1.66])
+m4_define([babl_required_version], [0.1.68])
 m4_define([cairo_required_version], [1.14.0])
 m4_define([cairo_pdf_required_version], [1.12.2])
 m4_define([fontconfig_required_version], [2.12.4])