NEW YORK (Reuters) - Muted gyrations in foreign exchange markets has turned companies complacent about hedging currency risks, and as the third-quarter earnings season gets underway investors should brace for U.S. companies to report sizeable negative impacts due to the stronger U.S. dollar, analysts warned.Wild currency moves can inject volatility in earnings for multinational firms. Companies that either forgo hedging or don't do enough of it, have in the past been hit hard due to unfavourable..