[gimp] configure.ac: require babl >= 0.1.51

[Ell <ell src gnome org>]

commit 5139a46602a9b34a950a74b12f1cfc3c3964da3a
Author: Ell <ell_se yahoo com>
Date:   Tue Jun 5 04:37:30 2018 -0400

    configure.ac: require babl >= 0.1.51

 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 0c0103ef60..5fbf72aaa9 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 50
+#define BABL_REQUIRED_MICRO 51
 
   babl_get_version (&babl_major_version,
                     &babl_minor_version,
diff --git a/configure.ac b/configure.ac
index 241b863c16..a02fa40003 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,7 +43,7 @@ m4_define([gimp_stable],
 m4_define([gimp_full_name], [GNU Image Manipulation Program])
 
 # required versions of other packages
-m4_define([babl_required_version], [0.1.50])
+m4_define([babl_required_version], [0.1.51])
 m4_define([gegl_major_minor_version], [0.4])
 m4_define([gegl_micro_version], [3])
 m4_define([gegl_required_version],