Update wdef_tools submodule reference

diff --git a/wdef_tools b/wdef_tools
index 0941f17..56ca35e 160000 (submodule)
--- a/wdef_tools
+++ b/wdef_tools
@@ -1 +1 @@
-Subproject commit 0941f171bbd4665e0eef5956b2f8c87acb8fc3a4
+Subproject commit 56ca35e9afb6ebe1bdf140929efd31b8a0256ea5