Scythe Specter throw NPE error on 0 cards in opponent hand

[JayDi85]

From CCG forums

Playing an EDH game against 2 AI opponents (computer - mad).
I attacked an opponent with Scythe Specter, damage triggered the "each opponent discards a card" ability. Got a MAGE server error with a stack trace that I'm unable to post since the reply editor thinks these are off-site URLs.

Basically, there's a null pointer exception in the ScytheSpecterEffect.apply() method at:
ScytheSpecter.java:132