luaL_newmetatable(L, IWINFO_WEXT_META);
luaL_register(L, NULL, R_common);
luaL_register(L, NULL, R_wext);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
lua_setfield(L, -2, "wext");
luaL_newmetatable(L, IWINFO_WEXT_META);
luaL_register(L, NULL, R_common);
luaL_register(L, NULL, R_wext);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
lua_setfield(L, -2, "wext");