[gimp] configure.ac: require lcms >= 2.8

[Michael Natterer <mitch src gnome org>]

commit fd8fd89d981762a1cb7fe9a06696cf4f72b2e6ea
Author: Michael Natterer <mitch gimp org>
Date:   Sat Sep 2 17:10:01 2017 +0200

    configure.ac: require lcms >= 2.8

 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 b22239c..8f8f27e 100644
--- a/app/sanity.c
+++ b/app/sanity.c
@@ -387,7 +387,7 @@ static gchar *
 sanity_check_lcms (void)
 {
 #define LCMS_REQUIRED_MAJOR 2
-#define LCMS_REQUIRED_MINOR 7
+#define LCMS_REQUIRED_MINOR 8
 
   gint lcms_version = cmsGetEncodedCMMversion ();
 
diff --git a/configure.ac b/configure.ac
index 3a918b1..4f4aa1d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,7 +69,7 @@ m4_define([poppler_data_required_version], [0.4.7])
 m4_define([libgudev_required_version], [167])
 m4_define([gexiv2_required_version], [0.10.6])
 m4_define([libmypaint_required_version], [1.3.0])
-m4_define([lcms_required_version], [2.7])
+m4_define([lcms_required_version], [2.8])
 m4_define([libpng_required_version], [1.6.25])
 m4_define([liblzma_required_version], [5.0.0])
 m4_define([openexr_required_version], [1.6.1])