refresh libusual

diff --git a/lib b/lib
index 24bcc4b45ebee57af523d95898e99e29a5ade369..46aacc71141b0104c365793d1ac2040b4ac095b2 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit 24bcc4b45ebee57af523d95898e99e29a5ade369
+Subproject commit 46aacc71141b0104c365793d1ac2040b4ac095b2