CANADA STOCKS-TSX little changed as energy shares slip with oil price

* TSX up 2.74 points, or 0.02 percent, at 15,531.58 * Six 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 a decline in the energy sector, prompted by a fall in oil's price, was offset by positive economic data from the United States. Energy share prices extended their drop on concerns over increasing supply and weak demand, with the price of oil slum