The City of Winnipeg is set to ban some medical cannabis growth within homes, leaving a local advocate to fear it could hurt patients more than it helps concerned neighbours. "(This adds) burdens, onerous regulations, licences and fees… The sick Canadians who need (cannabis) are losing out," Steven Stairs, president of the Winnipeg 420 Organizing Committee, told media Thursday. The comments came a few hours before city council directed staff to create new bylaw rules…