By Helen Reid LONDON (Reuters) -Zara owner Inditex reported a better start to its autumn sales on Wednesday, an encouraging sign as the world's biggest listed fast-fashion retailer grapples with the impact of a weak dollar and U.S. tariffs on consumer spending. Sales from August 1 to September 8 grew 9% in currency-adjusted terms compared to a year ago, picking up in pace from 5.1% growth over the first half. Shares in Inditex, which have fallen this year, gained 6% in early trading. The start to the th ...