message: Fix a C++ error by completeCityFlip
diff: @@ -753,11 +753,11 @@ def completeCityFlip(tPlot, iPlayer, iOwner, iCultureChange, bBarbarianDecay = T
  if bFlipUnits:
  flipUnitsInCityAfter(plot, iPlayer)
  else:
  - createGarrisons(tPlot, iPlayer, 2)
  + createGarrisons(plot, iPlayer, 2)
  plot.setRevealed(team(iPlayer).getID(), True, False, -1)
  - return city(tPlot)
  + return city(plot)
  # used: Congresses, Stability
  def isNeighbor(iPlayer1, iPlayer2):
  