Function pushuserdata

Dependencies/lua/src/ltests.c:1107–1111

static int pushuserdata (lua_State *L) {
  lua_Integer u = luaL_checkinteger(L, 1);
  lua_pushlightuserdata(L, cast_voidp(cast_sizet(u)));
  return 1;
}


static int udataval (lua_State *L) {