- Cleaned up some of the skill logic, so that skills that are casted on self, but have a unit id (an entry in skill_unit_db) will automatically re-route themself from a targetted-no-damage-skill to a ground-skill. When this happens, the effect packet is clif_skill_nodamage rather than clif_skill_poseffect (this is because that's how the dance/songs/encores behave).
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@7538 54d463be-8e91-2dee-dedb-b68131a5f0ec