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;