Come January, Dallas is scheduled to get a new revolving restaurant atop Reunion Tower, courtesy of chef Wolfgang Puck. (The Tower is the dandelion-topped building from the opening credits of the TV show “Dallas,” in case you’re not from the city.)  The name of the restaurant hasn’t been announced–in other words, it might be a Chinois or a Spago, and then again, it might be something totally new, just for Big D. This all reminds me of when Wolfie used to come to Dallas and do cooking classes for local food writers and editors at the Mansion on Turtle Creek (and  an affiliated hotel in Houston) back in the eighties. His PR agents in Houston, who had a wicked sense of humor, had aprons printed up with the name “Puck U” on them.