refresh libusual

diff --git a/lib b/lib
index bb8e55cb600836e95695f0cd633b4449c7904949..7fe98a4480242b19ce9e9d53bd3341bd3bf38823 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit bb8e55cb600836e95695f0cd633b4449c7904949
+Subproject commit 7fe98a4480242b19ce9e9d53bd3341bd3bf38823