GRACE JONES—Warm Leatherette (Island)" Disco’s dying, so they say, so what are all these ex-fashiori models to do? Now Grace ain’t standing still; gotta give her that; She’s hired a first-rate reggae band, picked some great tunes, and recorded them with none other than Chris Blackwell. Too bad she’s come upjvith such & load of fake cowhide. The problem is that no matter how Striking a figure she cuts onstage foith her whips and all, her voice has all the life of a recycled zombie. Unless you’re looking for j Dawn of the Dread, pass on this one. M:D.