Fix spire upgrade BC
Move spire upgrade BC to a place where V.building definitely exists and has valid contents. Fixes BC of old saves which previously would have failed with "includes is not a member of undefined" or similar.
Edited by svornost
Move spire upgrade BC to a place where V.building definitely exists and has valid contents. Fixes BC of old saves which previously would have failed with "includes is not a member of undefined" or similar.