CANADA STOCKS-TSX edges higher, TransCanada leads the way

* TSX rises 17.43 points, or 0.14 percent, to 12,522.24 * TransCanada shares rise 2.4 pct on Petronas deal * First Quantum drops more than 4 pct amid takeover battle By Solarina Ho and John Tilak TORONTO, Jan 9 (Reuters) - Canada's main stock index closed moderately higher on Wednesday, aided by a rise in TransCanada Corp after the company announced a C$6.5 billion pipeline deal, but gains were tempered by caution over the outlook for global economic growth. TransCanada sha