Fix warning about no such builtin

luprex/core/cpp/lpxclient.cpp

@@ -203,7 +203,7 @@ public:
     void receive_diff_from_server(StreamBuffer *sb) {
         world_to_synchronous();
         try {
-            DebugCollector dbc("patch_everything");
+            DebugCollector dbc("");
             int64_t nactor = world_->patch_everything(sb, &dbc);
             if (nactor != actor_id_) change_actor_id(nactor);
             dbc.dump(stdostream());

luprex/core/cpp/source.cpp

@@ -480,7 +480,7 @@ void SourceDB::register_lua_builtins() {
         }
         if (reg->get_func() == nullptr) {
             if (builtin == nullptr) {
-                if ((!reg->get_sandbox()) || (reg->get_args() != nullptr)) {
+                if (!reg->get_sandbox()) {
                     std::cerr << "No such builtin function: " << classname << " " << funcname << std::endl;
                 }
             } else {