
    Charles B. WELLS, et al., as Sheriffs of their respective Counties, and as residents and taxpayers of their respective counties, Appellants, v. Richard L. DUGGER, Secretary of the Department of Corrections, Appellee.
    No. 90-3361.
    District Court of Appeal of Florida, First District.
    Nov. 4, 1991.
    Mark Herron, Akerman, Senterfitt, Eid-son & Moffitt, Tallahassee, for appellants.
    James A. Peters, Sp. Asst. Atty. Gen., Tallahassee, for appellee.
   PER CURIAM.

This appeal challenges a summary judgment in favor of appellee in which the trial court rejected the argument that gain time and provisional release credits unconstitutionally commute punishment. Because appellants have demonstrated no error, we affirm that portion of the order. No cross appeal was filed regarding the trial court’s ruling that, appellants had standing to challenge the constitutionality of these statutory provisions. We accordingly do not address this issue.

ERVIN, ZEHMER and BARFIELD, JJ., concur.  