LONDON (Reuters) - European low-cost airline Wizz Air upgraded its annual profit forecast on Wednesday, after a strong third quarter performance when it carried more passengers. Wizz, which focuses on central and Eastern Europe, said it now expected full-year profits for the 12 months to the end of March to come in between 350 million euros (295.41 million pounds) to 355 million euros (299.63 million pounds), up from a previous forecast of between 335 million euros to 350 million. European..