CANADA STOCKS-TSX steady as U.S. data offsets energy drop

* TSX up 17.85 points, or 0.11 percent, at 15,552.17 * Seven of 10 main index sectors advance * Talisman, Enbridge fall with oil price By John Tilak TORONTO, Sept 12 (Reuters) - Canada's main stock index was little changed on Friday as positive economic data out of the United States helped overcome a decline in the energy sector following a lower oil price. Energy share prices extended their drop on concerns over increasing supply and weak demand, with the price of oil slump