Still tower upgrade issues lingering

[SMUnlimited]

Expansions for undead especially and humans, fails to actually upgrade towers and additional town halls for defense.

So the relevant possibilities are now:

• UpgradeBuilding cannot find the completed base Ziggurat, likely location of the town doesn't actually match or fit within the 2000 distance.
• IssueImmediateOrderById rejects the Spirit Tower order.
• The queue incorrectly considers the requested quantity satisfied.

[Messi-818]

Yes, the real reason is that the defendtown and defendtowndone functions references are invalid, There may be an error in the reference to the original underlying function in common.eai