By LORETTA FULTON It didn’t take David Lofton long to reach a conclusion. “I think it’s pretty good,” he said, “and the cobbler’s excellent.” Lofton is warden of the Middleton Unit of the Texas Department of Criminal Justice, located just north of Abilene. On May 16 and 17, Lofton and his close to 500-member correctional and support staff were treated