fix: prevent nil pointer panic when piping input to sqlcmd (fixes #607)#640

dlevy-msft-sql merged 1 commit intomicrosoft:mainmicrosoft/go-sqlcmd:mainfrom

dlevy-msft-sql:fix/stdin-pipe-panic-607dlevy-msft-sql/go-sqlcmd:fix/stdin-pipe-panic-607Copy head branch name to clipboard