Range calculation fix.

Channeled SPELL_AURA_PERIODIC_TRIGGER_SPELL will now not trigger spell if target is out of range.
Channeled periodic damage auras will now not deal damage if target is out of range.

--HG--
branch : trunk

src/game/Object.h

@@ -411,7 +411,7 @@ class TRINITY_DLL_SPEC WorldObject : public Object
 
         float GetObjectSize() const
         {
-            return ( m_valuesCount > UNIT_FIELD_BOUNDINGRADIUS ) ? m_floatValues[UNIT_FIELD_BOUNDINGRADIUS] : DEFAULT_WORLD_OBJECT_SIZE;
+            return ( m_valuesCount > UNIT_FIELD_COMBATREACH ) ? m_floatValues[UNIT_FIELD_COMBATREACH] : DEFAULT_WORLD_OBJECT_SIZE;
         }
         bool IsPositionValid() const;
         void UpdateGroundPositionZ(float x, float y, float &z) const;

src/game/SpellAuras.cpp

@@ -543,7 +543,11 @@ void Aura::Update(uint32 diff)
     }
 
     // Channeled aura required check distance from caster except in possessed cases
-    if(IsChanneledSpell(m_spellProto) && m_caster_guid != m_target->GetGUID() && !m_target->isPossessed())
+    Unit *pRealTarget = (GetSpellProto()->EffectApplyAuraName[GetEffIndex()] == SPELL_AURA_PERIODIC_TRIGGER_SPELL) ? GetTriggerTarget() : m_target;
+    if(!pRealTarget)
+        return;
+
+    if(IsChanneledSpell(m_spellProto) && !pRealTarget->isPossessed() && pRealTarget->GetGUID() != GetCasterGUID())
     {
         Unit* caster = GetCaster();
         if(!caster)
@@ -569,11 +573,8 @@ void Aura::Update(uint32 diff)
         if(Player* modOwner = caster->GetSpellModOwner())
             modOwner->ApplySpellMod(GetId(), mod, radius,NULL);
 
-        if(!caster->IsWithinDistInMap(m_target,radius))
-        {
-            m_target->RemoveAura(GetId(),GetEffIndex());
+        if(!caster->IsWithinDistInMap(pRealTarget, radius))
             return;
-        }
     }
 
     if(m_isPeriodic && (m_duration >= 0 || m_isPassive || m_permanent))