Implement vehicles created by player mounts.

Original idea by Elmaster, packet research by Wrong, ty.

--HG--
branch : trunk

src/game/Unit.h

@@ -631,6 +631,7 @@ enum NPCFlags
     UNIT_NPC_FLAG_STABLEMASTER          = 0x00400000,       // 100%
     UNIT_NPC_FLAG_GUILD_BANKER          = 0x00800000,       // cause client to send 997 opcode
     UNIT_NPC_FLAG_SPELLCLICK            = 0x01000000,       // cause client to send 1015 opcode (spell click), dynamic, set at loading and don't must be set in DB
+    UNIT_NPC_FLAG_PLAYER_VEHICLE        = 0x02000000,       // players with mounts that have vehicle data should have it set
     UNIT_NPC_FLAG_GUARD                 = 0x10000000,       // custom flag for guards
     UNIT_NPC_FLAG_OUTDOORPVP            = 0x20000000,       // custom flag for outdoor pvp creatures
 };
@@ -1272,7 +1273,7 @@ class TRINITY_DLL_SPEC Unit : public WorldObject
 
         bool IsMounted() const { return HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_MOUNT ); }
         uint32 GetMountID() const { return GetUInt32Value(UNIT_FIELD_MOUNTDISPLAYID); }
-        void Mount(uint32 mount);
+        void Mount(uint32 mount, uint32 vehicleId=0);
         void Unmount();
 
         uint16 GetMaxSkillValueForLevel(Unit const* target = NULL) const { return (target ? getLevelForTarget(target) : getLevel()) * 5; }
@@ -1913,6 +1914,7 @@ class TRINITY_DLL_SPEC Unit : public WorldObject
         bool IsAIEnabled, NeedChangeAI;
         MovementInfo m_movementInfo;
         bool CreateVehicleKit(uint32 id);
+        void RemoveVehicleKit();
         Vehicle *GetVehicleKit()const { return m_vehicleKit; }
         Vehicle *GetVehicle()   const { return m_vehicle; }
         bool IsOnVehicle(const Unit *unit) const { return m_vehicle && m_vehicle == unit->GetVehicleKit(); }