message: Infantry cannot upgrade to Marine
diff: <bPillage>1</bPillage>
  <bIgnoreBuildingDefense>1</bIgnoreBuildingDefense>
  <UnitClassUpgrades>
  - <UnitClassUpgrade>
  - <UnitClassUpgradeType>UNITCLASS_MARINE</UnitClassUpgradeType>
  - <bUnitClassUpgrade>1</bUnitClassUpgrade>
  - </UnitClassUpgrade>
  <UnitClassUpgrade>
  <UnitClassUpgradeType>UNITCLASS_MECHANIZED_INFANTRY</UnitClassUpgradeType>
  <bUnitClassUpgrade>1</bUnitClassUpgrade>
  <bPillage>1</bPillage>
  <bIgnoreBuildingDefense>1</bIgnoreBuildingDefense>
  <UnitClassUpgrades>
  - <UnitClassUpgrade>
  - <UnitClassUpgradeType>UNITCLASS_MARINE</UnitClassUpgradeType>
  - <bUnitClassUpgrade>1</bUnitClassUpgrade>
  - </UnitClassUpgrade>
  <UnitClassUpgrade>
  <UnitClassUpgradeType>UNITCLASS_MECHANIZED_INFANTRY</UnitClassUpgradeType>
  <bUnitClassUpgrade>1</bUnitClassUpgrade>
  