(Reuters) - Hotel operator Marriott International Inc posted a 12% fall in quarterly profit on Wednesday partly hit by higher costs, and said the coronavirus outbreak had mainly affected its Asia Pacific region.Net income fell to $279 million, or 85 cents per share, in the fourth quarter ended Dec. 31, from $317 million, or 92 cents per share, a year earlier.Revenue rose to $5.37 billion from $5.29 billion.