Initialize "weakness_type" field in global handles

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 8e0ff13d3341e8ab6bb9befdbd481186312e2159..b8ef33f76e35659ad442869a45c2b7e97a748dbc 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -76,6 +76,7 @@ class GlobalHandles::Node {
     index_ = static_cast<uint8_t>(index);
     DCHECK(static_cast<int>(index_) == index);
     set_state(FREE);
+    set_weakness_type(NORMAL_WEAK);
     set_in_new_space_list(false);
     parameter_or_next_free_.next_free = *first_free;
     *first_free = this;