Partially switch ot shaper to shape_plan

src/hb-shape-plan.cc

diff --git a/src/hb-shape-plan.cc b/src/hb-shape-plan.cc
index db21e88..099d09c 100644
--- a/src/hb-shape-plan.cc
+++ b/src/hb-shape-plan.cc
@@ -136,6 +136,17 @@
 {
   static const hb_shape_plan_t _hb_shape_plan_nil = {
     HB_OBJECT_HEADER_STATIC,
+
+    NULL, /* face */
+    _HB_BUFFER_PROPS_DEFAULT, /* props */
+
+    {NULL}, /* shapers */
+
+    {
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+    }
   };
 
   return const_cast<hb_shape_plan_t *> (&_hb_shape_plan_nil);