(Reuters) - Shares in Swedish e-sports and gaming firm MTG dived nearly 20% on Tuesday, after it said talks with live streaming platform Huya over a joint venture to break into the Chinese e-sports market had been terminated.MTG said in September that Huya, which is backed by Chinese internet giant Tencent , was planning to buy a $30 million (23 million pounds) stake in its Turtle Entertainment (ESL) e-sport business, sending its shares up 25% when the deal was announced."Differing views..