SINGAPORE, August 16(ABC): Asian markets struggled for direction on Tuesday, weighed by worries over global growth following weak China data that knocked oil prices and commodity-linked currencies. The dollar held near a one-week high as investors piled back into the safe-haven currency, while the Aussie, euro and Chinese yuan buckled. MSCI’s broadest index of Asia-Pacific shares outside Japan (.MIAPJ0000PUS) ticked …