Added TARGET_UNIT_AREA_SCRIPT target to the list of target types using custom targets defined in spell_script_target.

--HG--
branch : trunk

src/game/Spell.cpp

@@ -1530,6 +1530,7 @@ void Spell::SetTargetMap(uint32 i,uint32 cur,std::list<Unit*> &TagUnitMap)
         }break;
         case TARGET_SCRIPT:
         case TARGET_SCRIPT_COORDINATES:
+        case TARGET_UNIT_AREA_SCRIPT:
         {
             SpellScriptTarget::const_iterator lower = spellmgr.GetBeginSpellScriptTarget(m_spellInfo->Id);
             SpellScriptTarget::const_iterator upper = spellmgr.GetEndSpellScriptTarget(m_spellInfo->Id);