bugfix for single cards in deck area

src/arkhamdb/DeckImporter.ttslua

@@ -454,7 +454,11 @@ function removeBusyZones(playerColor, zoneDecks)
   -- check for existing deck
   local cardsInDeckArea = 0
   for _, obj in pairs(playermatApi.getDeckAreaObjects(playerColor)) do
-    cardsInDeckArea = cardsInDeckArea + #obj.getObjects()
+    if obj.type == "Card" then
+      cardsInDeckArea = cardsInDeckArea + 1
+    elseif obj.type == "Deck" then
+      cardsInDeckArea = cardsInDeckArea + #obj.getObjects()
+    end
   end
 
   -- threshhold of 16 cards for skipping deck import to cover cases like Tekeli-li cards