[fixed]Loss of abilities prevents Death Ward

[Korath]

Describe the bug:
Death Ward can't regenerate a creature that's lost all abilities (I saw this with Lignify and Spiny Starfish).

Which card behaved improperly?
Death Ward.

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
df88666 from 2017 Dec 14.

What exactly should be the correct behavior/interaction?
Permanents that lose all abilities only lose all of their own abilities.

Are any other cards possibly affected by this bug?
Probably a lot of things that say "regenerate [something besides itself]", but the bug is specifically in card_death_ward(): it calls can_regenerate() instead of can_be_regenerated().

[Aswan jaguar]

Fixed in commit 63cf96ef.
And fixed probably all others that needed this change in same commit.