UPDATE 1-Bearish U.S. dollar bets at lowest since early January

(Adds table, comment, details, byline) By Saqib Iqbal Ahmed NEW YORK, May 25 (Reuters) - Speculators' net short dollar bets fell in the last week to the lowest since early January, according to calculations by Reuters and Commodity Futures Trading Commission data released on Friday. The value of the net short dollar positions, derived from net positions of International Monetary Market speculators in the yen, euro, British pound, Swiss franc and Canadian and Australian dollars, was