By Evan Dawson, Finger Lakes Editor Just days before veraison, Heron Hill Winery on Keuka Lake has cut ties with winemaker Thomas Laszlo. The Hungarian-born winemaker had been with the operation since the summer of 2002. The winery declined to explain the decision. "We're starting the search for a new head winemaker immediately," explained marketing director Kitty Oliver. When asked about the urgency with harvest approaching, Oliver said that Heron Hill will not make any rash decisions. "We're going to be very specific," she said. "We're looking for a world-class winemaker. We're not going to do this fast; we're going…