update doslib

diff --git a/src/lib/doslib b/src/lib/doslib
index 38c2173..67de840 160000 (submodule)
--- a/src/lib/doslib
+++ b/src/lib/doslib
@@ -1 +1 @@
-Subproject commit 38c21736dab169440d686522acef717bd15d37d9
+Subproject commit 67de840669443e3d3134ed12c1a0b3702d2b13cd