Remove unnecessary Rows.Close()

[bbaktaeho]

Hi, I frequently use the CollectOneRow function and noticed that Close() is redundantly called. There's no issue if it's already closed, but please remove it for cleaner code.

[jackc]

That Close() is required.

The code above only reads a single row. If the result set had more than one row then rows.Err() would be returned before the deferred rows.Close(). This would be incorrect.