CardChoiceSpawnUniqueCardPatch

This is a utility mod which patches the erroneous CardChoice.SpawnUniqueCard method in the base game code.

Previously, the game would not properly check if the allowMultiple or blacklistedcategories fields of a card should have prevented it from being offered. Moreover, if it had done this, it would have been possible to crash the game since the method was called recursively with no garunteed exit.