eris: initialization and serialization for 'nextid' field

luprex/eris-master/src/lstate.c

@@ -217,6 +217,7 @@ static void preinit_state (lua_State *L, global_State *g) {
   L->nny = 1;
   L->status = LUA_OK;
   L->errfunc = 0;
+  L->nextid = 0;
 }