Randall L. Wreghitt, one of the producers of "The Food Chain" and "Camping With Henry and Tom" and an associate producer of "Three Tall Women," has been tapped to received The Fourth Annual Robert Whitehead Award, passed out by Frederic B. Vogel's Commercial Theatre Institute in association with The League of American Theatres and Producers and The Theatre Development Fund.The award, for "Outstanding Achievement in Commercial Producing," will be given Jan. 30 at the Windows on Broadway Restaurant at The Renaissance Hotel. The award's namesake is faring spectacularly well these days, co-producing with Lewis Allen and Spring Sirkin the dramatic sensation of the season, Terrence McNally's critically cheered "Master Class," starring Zoe Caldwell.