fix card back crash

Author: lord-ruby

lib/hooks.lua

@@ -1828,7 +1828,7 @@ function Card:set_ability(center, initial, delay_sprites)
         matref(self, center, initial, delay_sprites)
     else
         if self.config and self.config.center and Entropy.FlipsideInversions and not Entropy.is_inverted(center)
-        and pseudorandom("marked") < 0.10 and G.GAME.Marked and G.STATE == G.STATES.SHOP and (not self.area or not self.area.config.collection) then
+        and pseudorandom("marked") < 0.10 and G.GAME.Marked and G.STATE == G.STATES.SHOP and (not self.area or not self.area.config.collection) and Entropy.Inversion(center) then
             matref(self, G.P_CENTERS[Entropy.Inversion(center)], initial, delay_sprites)
         elseif self.config and self.config.center
         and pseudorandom("trump_card") < 0.10 and G.GAME.TrumpCard and G.STATE == G.STATES.SMODS_BOOSTER_OPENED
@@ -3780,4 +3780,4 @@ function Card:sell_card()
 		end
 	end
 	sell_card_stuff(self)
-end 
+end