fix the use of empty fields in the response

internal/server/rpc/responsers.go

@@ -37,7 +37,9 @@ func NewError(code int, message string, data any, id *json.RawMessage) *RPCRespo
 	Error = map[string]any{
 		"code":    code,
 		"message": message,
-		"data":    data,
+	}
+	if data != nil {
+		Error["data"] = data
 	}
 
 	return &RPCResponse{

internal/server/sv1/lua_handler.go

@@ -186,11 +186,6 @@ func (h *HandlerV1) handleLUA(sid string, r *http.Request, req *rpc.RPCRequest,
 		L.SetField(scriptDataTable, "result", resTable)
 		L.SetField(outTable, "send", L.NewFunction(func(L *lua.LState) int {
 			res := L.Get(1)
-			if res == lua.LNil {
-				__exit = 0
-				L.RaiseError("__successfull")
-				return 0
-			}
 
 			resFTable := scriptDataTable.RawGetString("result")
 			if resPTable, ok := res.(*lua.LTable); ok {