Vehicles: Prohibit entering vehicle in combat only if it is a multi-passenger mount

Scripts/Icecrown Citadel: Changed Bone Spike id and remove teleport z+3 hack, its a vehicle, thx wowgargamel
Scripts/Icecrown Citadel: Fixed typo in variable name, thx Paradox
Scripts/Icecrown Citadel: Added warning emote for Bone Storm

--HG--
branch : trunk

src/server/game/Entities/Unit/Unit.cpp

@@ -16377,7 +16377,7 @@ void Unit::EnterVehicle(Vehicle *vehicle, int8 seatId)
 
     if (GetTypeId() == TYPEID_PLAYER)
     {
-        if(this->ToPlayer()->isInCombat())
+        if (vehicle->GetBase()->GetTypeId() == TYPEID_PLAYER && this->ToPlayer()->isInCombat())
             return;
 
         this->ToPlayer()->InterruptNonMeleeSpells(false);