Refresh libusual

diff --git a/lib b/lib
index 0d2383aef23b7b3b3d3a796d589959b2aed79bd8..0812279371dcf07ea3961642ecf88403dceda2e6 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit 0d2383aef23b7b3b3d3a796d589959b2aed79bd8
+Subproject commit 0812279371dcf07ea3961642ecf88403dceda2e6