refresh libusual

diff --git a/lib b/lib
index 28b92904c7e2dd55257d842a25483dee67873644..ea94ffb5ec65f411945f9fac8de96cdaf85179e7 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit 28b92904c7e2dd55257d842a25483dee67873644
+Subproject commit ea94ffb5ec65f411945f9fac8de96cdaf85179e7