[HB] Use face_t directly instead of ot_layout_t
diff --git a/src/hb-font-private.h b/src/hb-font-private.h
index 8e0fe72..13f07b0 100644
--- a/src/hb-font-private.h
+++ b/src/hb-font-private.h
@@ -31,6 +31,8 @@
 
 #include "hb-font.h"
 
+#include "hb-ot-layout-private.h"
+
 HB_BEGIN_DECLS
 
 /*
@@ -82,6 +84,8 @@
 
   hb_font_callbacks_t *fcallbacks;
   hb_unicode_callbacks_t *ucallbacks;
+
+  hb_ot_layout_t ot_layout;
 };