message: Fix Plantation to Watermill conversion
diff: @@ -1624,15 +1624,10 @@ iNumEras = 7
  #Improvements
  iNumImprovements = 28
  -(iLandWorked, iWaterWorked, iCityRuins, iHut, iFarm, iPaddyField, iFishingBoats, iHighSeaFishingBoats, iWhalingBoats, iMine,
  +(iLandWorked, iWaterWorked, iCityRuins, iHut, iFarm, iPaddyField, iFishingBoats, iOceanFishery, iWhalingBoats, iMine,
  iWorkshop, iLumbermill, iWindmill, iWatermill, iPlantation, iSlavePlantation, iQuarry, iPasture, iCamp, iWell,
  iOffshorePlatform, iWinery, iCottage, iHamlet, iVillage, iTown, iFort, iForestPreserve) = range(iNumImprovements)
  -iNumImprovements = 28
  -(iLandWorked, iWaterWorked, iCityRuins, iTribalVillage, iFarm, iFishingBoats, iHighSeaFishingBoats, iWhalingBoats, iMine, iWorkshop,
  -iLumbermill, iWindmill, iWatermill, iPlantation, iSlavePlantation, iQuarry, iPasture, iCamp, iWell, iOffshorePlatform,
  -iOrchard, iCottage, iHamlet, iVillage, iTown, iFort, iNatureReserve, iMarineReserve) = range(iNumImprovements)
  -
  #feature & terrain
  iNumFeatures = 10
  