Core/Players: Don't set instanceId to 0 when player is on transport during loading, there CAN be transports inside instances

Core/Scripts: Added waypoint id to OnRelocate transport hook
Core/Scripts: Make use of ZoneScript::GetGameObjectEntry at gameobject creation (makes it possible to override gameobject entries in instances)
Core/Transports: Call InstanceScript::EventInform for transport events
Core/Transports: Use guid from db for transports, not just its entry - adds partial support for instancing them (still cannot use transports table for it, but can spawn manually now)
Scripts/Icecrown Citadel: Fixed crash in Deathbringer Saurfang when event is started by more than one person (can't do this anymore)

Closes isssue #3749.

--HG--
branch : trunk

src/server/game/Globals/ObjectMgr.cpp

@@ -261,6 +261,7 @@ ObjectMgr::ObjectMgr()
     m_hiCorpseGuid      = 1;
     m_hiPetNumber       = 1;
     m_hiGroupGuid       = 1;
+    m_hiMoTransGuid     = 1;
     m_ItemTextId        = 1;
     m_mailid            = 1;
     m_equipmentSetGuid  = 1;
@@ -6119,6 +6120,10 @@ void ObjectMgr::SetHighestGuids()
     if (result)
         m_hiGoGuid = (*result)[0].GetUInt32()+1;
 
+    result = WorldDatabase.Query("SELECT MAX(guid) FROM transports");
+    if (result)
+        m_hiMoTransGuid = (*result)[0].GetUInt32()+1;
+
     result = CharacterDatabase.Query("SELECT MAX(id) FROM auctionhouse");
     if (result)
         m_auctionid = (*result)[0].GetUInt32()+1;
@@ -6265,6 +6270,13 @@ uint32 ObjectMgr::GenerateLowGuid(HighGuid guidhigh)
                 World::StopNow(ERROR_EXIT_CODE);
             }
             return m_hiGroupGuid++;
+        case HIGHGUID_MO_TRANSPORT:
+            if (m_hiMoTransGuid >= 0xFFFFFFFE)
+            {
+                sLog.outError("MO Transport guid overflow!! Can't continue, shutting down server. ");
+                World::StopNow(ERROR_EXIT_CODE);
+            }
+            return m_hiMoTransGuid++;
         default:
             ASSERT(0);
     }

src/server/game/Globals/ObjectMgr.h

@@ -982,6 +982,7 @@ class ObjectMgr
         uint32 m_hiDoGuid;
         uint32 m_hiCorpseGuid;
         uint32 m_hiGroupGuid;
+        uint32 m_hiMoTransGuid;
 
         QuestMap            mQuestTemplates;