The verdict shall be written, signed by the presiding juror and read by the clerk to the jury, and the inquiry made whether it is the jury’s verdict. If any juror disagrees, the jury must be sent out again; but if no disagreement is expressed, and neither party requires the jury to be polled, the verdict is complete and the jury discharged from the case. If the verdict is defective in form only, it may be corrected by the court, with the assent of the jury, before it is discharged.