CANADA STOCKS-TSX steady as market awaits Fed; Barrick drops

* TSX down 3.89 points, or 0.03 percent, at 14,579.22 * Seven of 10 main index sectors advance * Loblaw, CGI climb after reporting results By John Tilak TORONTO, April 30 (Reuters) - Canada's main stock index was little changed on Wednesday as a decline in shares of Barrick Gold Corp and a drop in commodity prices weighed on investor sentiment ahead of a policy statement from the U.S. Federal Reserve later in the day. Barrick's stock fell 1.3 percent after the miner reported