[svn] Set destination when calling CastSpell. This should fix the bug that seed of corruption does not work and "cannot find destination for spell" spams. Not sure if this is the correct way to fix it.

--HG--
branch : trunk

src/game/Unit.cpp

@@ -999,6 +999,7 @@ void Unit::CastSpell(Unit* Victim,SpellEntry const *spellInfo, bool triggered, I
 
     SpellCastTargets targets;
     targets.setUnitTarget( Victim );
+    targets.setDestination( Victim->GetPositionX(), Victim->GetPositionY(), Victim->GetPositionZ(), false);
     spell->m_CastItem = castItem;
     spell->prepare(&targets, triggredByAura);
 }