Update wdef_tools submodule

diff --git a/wdef_tools b/wdef_tools
index d9a396f6dac0f499f21c1f796e6bf39f28e0a71e..a641ba3bb7f370eeaa9e2a8186f799dd3f2e6f5b 160000 (submodule)
--- a/wdef_tools
+++ b/wdef_tools
@@ -1 +1 @@
-Subproject commit d9a396f6dac0f499f21c1f796e6bf39f28e0a71e
+Subproject commit a641ba3bb7f370eeaa9e2a8186f799dd3f2e6f5b