TOKYO (Reuters) - Asian stocks slipped on Wednesday on the specter of a Sino-U.S. trade war ahead of an end-of-week deadline for U.S. tariffs on $34 billion worth of Chinese imports while the yuan stabilized after China’s central bank moved to calm nervous investors. MSCI’s broadest index of Asia-Pacific shares outside Japan edged down 0.2 percent, a day after it hit a nine-month low. Japan’s Nikkei lost 0.7 percent.