Steven F. Goldstone, the chairman and chief executive officer of one of the four most reviled corporations in America, looks like a man in need of a cigarette. A dismal funk has settled over the Benton Convention Center in Winston-Salem, N.C., which is where his company, RJR Nabisco, is about to open its annual shareholders' meeting. The meeting won't be pleasant for him, but what is these days? It's reefer madness out there -- not so much in Winston-Salem, one of the last of the country's pro-tobacco redoubts, but almost everywhere else.