In the show-biz of this country, where an ex-movie-star president is replaced by the one whose favorite idiom is "Stay Tuned," David Lynch plays a solo matchmaker who twins movies and TV, skull-splitting the "talking heads." After the never-ending mystery of Twin Peaks, which made even Gorby wonder who killed poor Laura and worry about his own popularity in the U.S, Lynch now shows up with a new flip-flop thriller, Wild at Heart, which makes you sweat with