- Added missing abilities for devil & ghost dragon
- Stack affected by Berserk should not try to attack itself

Neither of these can be actually seen in game duo to more general engine bugs :/

git-svn-id: https://vcmi.svn.sourceforge.net/svnroot/vcmi/trunk@3362 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834