refresh libusual

diff --git a/lib b/lib
index 5018e6a3c396584f8ecdc187be927bdec1e098f6..f302d46bd2cb10ca97749c204bcc64d6fb78ef50 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit 5018e6a3c396584f8ecdc187be927bdec1e098f6
+Subproject commit f302d46bd2cb10ca97749c204bcc64d6fb78ef50