message: Fix a congress error
diff: @@ -1014,7 +1014,7 @@ class Congress:
  # exclude master/vassal relationships
  if team(iPlayer).isVassal(iLoopPlayer): continue
  if team(iLoopPlayer).isVassal(iPlayer): continue
  - if pPlayer.isAVassal() and master(iPlayer) == master(iLoopPlayer): continue
  + if team(iPlayer).isAVassal() and master(iPlayer) == master(iLoopPlayer): continue
  # cannot demand cities while at war
  if team(iPlayer).isAtWar(iLoopPlayer): continue
  