When Reed Exhibitions announced yesterday that they are ‘postponing’ (I’m guessing forever) the gargantuan Eastern Sports And Outdoor Show, they may have shot themselves in the contractual foot with the litigation equivalent of a .505 Gibbs. Why? Because they pulled the rug out from under more than 1,200 vendors, who’ve each paid thousands of dollars in booth fees and travel expenses. Reed has promised to refund their booth rental fees, but . . .