By Emma Rumney LONDON (Reuters) -Shares in Diageo, the world’s top spirits maker, fell more than 4% on Tuesday after it warned of further troubles in Latin America, adding to investor concerns a build up of unsold stock in the region would be hard to clear. The maker of Johnnie Walker whisky and Tanqueray gin also posted a slight decline in organic net sales, just missing analyst estimates, and pointed to a drop in North America – its biggest market, where the company has been losing market share. “We are not satisfied with these results and I personally am restless to get this business to per…