Skip cards absolutely not supported by Wagic when exporting

mtg.py

@@ -305,6 +305,9 @@ class Deck(CardList):
         ]
         for card, count in cards.iteritems():
             sets = card.sets
+            if not sets:
+                print 'Card not supported:', card
+                continue
             line = '{0} ({1}) *{2}\n'.format(card.name, card.sets[-1], count)
             lines.append(line)
         with open(filename, 'w') as f: