Update grid system. Try to fix some crashes and transport passengers (now they are despawned after a while).

src/server/game/Entities/DynamicObject/DynamicObject.cpp

@@ -27,7 +27,7 @@
 #include "GridNotifiersImpl.h"
 #include "ScriptMgr.h"
 
-DynamicObject::DynamicObject() : WorldObject(),
+DynamicObject::DynamicObject(bool isWorldObject) : WorldObject(isWorldObject),
     _aura(NULL), _removedAura(NULL), _caster(NULL), _duration(0), _isViewpoint(false)
 {
     m_objectType |= TYPEMASK_DYNAMICOBJECT;
@@ -79,7 +79,7 @@ void DynamicObject::RemoveFromWorld()
     }
 }
 
-bool DynamicObject::CreateDynamicObject(uint32 guidlow, Unit* caster, uint32 spellId, Position const& pos, float radius, bool active, DynamicObjectType type)
+bool DynamicObject::CreateDynamicObject(uint32 guidlow, Unit* caster, uint32 spellId, Position const& pos, float radius, DynamicObjectType type)
 {
     SetMap(caster->GetMap());
     Relocate(pos);
@@ -105,8 +105,7 @@ bool DynamicObject::CreateDynamicObject(uint32 guidlow, Unit* caster, uint32 spe
     SetFloatValue(DYNAMICOBJECT_RADIUS, radius);
     SetUInt32Value(DYNAMICOBJECT_CASTTIME, getMSTime());
 
-    m_isWorldObject = active;
-    if (active)
+    if (IsWorldObject())
         setActive(true);    //must before add to map to be put in world container
 
     if (!GetMap()->AddToMap(this))