fix warning in livy and 401 numeric compare to fix #433
fix warning in livy and 401 numeric compare to fix #433

kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr,kevinykuo/sparklyr