Add ASSERT_POD for most objects
diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh
index b8407e9..5cdf8a0 100644
--- a/src/hb-set-private.hh
+++ b/src/hb-set-private.hh
@@ -36,6 +36,9 @@
 
 struct _hb_set_t
 {
+  hb_object_header_t header;
+  ASSERT_POD ();
+
   inline void init (void) {
     header.init ();
     clear ();
@@ -158,7 +161,6 @@
   elt_t elt (hb_codepoint_t g) const { return elts[g >> SHIFT]; }
   elt_t mask (hb_codepoint_t g) const { return elt_t (1) << (g & MASK); }
 
-  hb_object_header_t header;
   elt_t elts[ELTS]; /* XXX 8kb */
 
   ASSERT_STATIC (sizeof (elt_t) * 8 == BITS);