Define return_trace()

Not functional change (expected!).

src/hb-ot-hhea-table.hh

diff --git a/src/hb-ot-hhea-table.hh b/src/hb-ot-hhea-table.hh
index 992fe55..2411453 100644
--- a/src/hb-ot-hhea-table.hh
+++ b/src/hb-ot-hhea-table.hh
@@ -52,7 +52,7 @@
   inline bool sanitize (hb_sanitize_context_t *c) const
   {
     TRACE_SANITIZE (this);
-    return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
+    return_trace (c->check_struct (this) && likely (version.major == 1));
   }
 
   public: