Refresh libusual

diff --git a/lib b/lib
index d9e3bf148193958f02dcf47ea47ab45dd9b119d1..5af48ebd346f75cf3cfc658492f3cfd1901c3bf7 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit d9e3bf148193958f02dcf47ea47ab45dd9b119d1
+Subproject commit 5af48ebd346f75cf3cfc658492f3cfd1901c3bf7