Expose internal_color enum (so that g++ doesn't complain)

diff --git a/util b/util
index c532f5ba7fbf0014be7749d0d78018a83267270a..8becfa1fe92044e097d089cfb67c1967c87f76fb 160000 (submodule)
--- a/util
+++ b/util
@@ -1 +1 @@
-Subproject commit c532f5ba7fbf0014be7749d0d78018a83267270a
+Subproject commit 8becfa1fe92044e097d089cfb67c1967c87f76fb