Unbreak build (offsetof only works for POD types)

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 6377af6e6c39e5437307286f95357b1ba3961323..51e904e8a8df8a46b1b8502b63344a1901f05f81 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -60,8 +60,8 @@ class GlobalHandles::Node {
   }
 
   Node() {
-    STATIC_ASSERT(offsetof(Node, class_id_) == Internals::kNodeClassIdOffset);
-    STATIC_ASSERT(offsetof(Node, flags_) == Internals::kNodeFlagsOffset);
+    ASSERT(OFFSET_OF(Node, class_id_) == Internals::kNodeClassIdOffset);
+    ASSERT(OFFSET_OF(Node, flags_) == Internals::kNodeFlagsOffset);
     STATIC_ASSERT(static_cast<int>(NodeState::kMask) ==
                   Internals::kNodeStateMask);
     STATIC_ASSERT(WEAK == Internals::kNodeStateIsWeakValue);