From 41d1a1c10f7e5ca69a337ae164d270e09b5f93ac Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 11 Dec 2018 22:48:27 -0500
Subject: [PATCH] [subset] Minor

---
 src/hb-machinery.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-machinery.hh b/src/hb-machinery.hh
index 906fad5a6..5180e1e02 100644
--- a/src/hb-machinery.hh
+++ b/src/hb-machinery.hh
@@ -552,7 +552,7 @@ struct hb_serialize_context_t
   }
 
   template <typename Type>
-  inline Type *start_embed (void) const
+  inline Type *start_embed (const Type *_ HB_UNUSED = nullptr) const
   {
     Type *ret = reinterpret_cast<Type *> (this->head);
     return ret;