message: Rome and Byzantium are still named Roman Empire if the other exists but is their vassal
diff: @@ -1258,7 +1258,7 @@ def specificAdjective(iPlayer):
  return "TXT_KEY_CIV_POLYNESIA_TUI_TONGA"
  elif iCiv == iRome:
  - if player(iByzantium).isAlive():
  + if player(iByzantium).isAlive() and not team(iByzantium).isVassal(team(iCiv).getID()):
  return "TXT_KEY_CIV_ROME_WESTERN"
  elif iCiv == iTamils:
  @@ -1283,7 +1283,7 @@ def specificAdjective(iPlayer):
  return "TXT_KEY_CIV_ETHIOPIA_AKSUMITE"
  elif iCiv == iByzantium:
  - if player(iRome).isAlive() and player(iRome).getNumCities() > 0:
  + if player(iRome).isAlive() and player(iRome).getNumCities() > 0 and not team(iRome).isVassal(team(iCiv).getID()):
  return "TXT_KEY_CIV_BYZANTIUM_EASTERN"
  if bEmpire and controlsCity(iPlayer, location(plots.capital(iRome))):
  