PHILADELPHIA — The snow and cold may be set to engulf the greater Philadelphia area, but the Flyers are heating up. Winners of four straight entering a showdown with the Dallas Stars on Thursday night, the Flyers dominated in a 5-1 victory that was a wire-to-wire effort. Just how good was the effort? They held the Stars to just one shot on goal in the first period, and eight in the second. According to Natural Stat Trick, they held the percentage of shot attempts at 67.5% in the opening frame at all strengths and 60% in the second period. The Stars did try to turn it up a smidge in the final f…