Healthcare stocks .GSPTTHC also fell 0.4% with pot producers Aurora Cannabis Inc ACB.TO, Tilray TLRY.TO among the top drags. By Amal S Oct 12 (Reuters) - Canada's main stock index was little changed on Tuesday, as weakness in consumer staples stocks was offset by gains in commodity-linked shares, while fears around higher inflation dented market sentiment. Limiting losses were materials stocks .GSPTTMT, which include precious and base metals miners and fertilizer companies, that added 1.3% as gold futures GCc1 rose 0.2% to $1,757.5 an ounce.