K 10 svn:author V 8 sveinung K 8 svn:date V 27 2017-04-05T14:24:34.491996Z K 7 svn:log V 259 Make it possible to check if 0 units is certain. Allow checking if a player can reason that a tile without any reported units really has no units on it. The presence of units is reported by the units them self or by an occupied city. See hrm Feature #649819 END