SILK update
diff --git a/silk b/silk
index fd1a5db..4def273 160000
--- a/silk
+++ b/silk
@@ -1 +1 @@
-Subproject commit fd1a5db140d51e7188e5126db2edc0ab923cfa8c
+Subproject commit 4def273b9c02ca25b39962c8fc5917dea0f0b6e6