By Julia Pastor in Madrid, and Ana Fuentes in New York | El País. The Spanish minister of Economy, Luis de Guindo, assured the World Economic Forum at Davos that Spain will set the structural deficit at 0% for the whole of the country’s regional governments from year 2020 on, despite Brussels does let the states fix it at 0,5% “There is a need to send a signal to the markets,” said the minister during…