SMSG_TRAINER_LIST
   uint64 Npcguid
   uint32 trainer_type;<<<<<<<<<<
   uint32 spells_size 
   {
       uint32 spell
       uint8  canlearn
       uint32 spellcost
       uint32 unk1
       uint32 unk2
       uint8  spelllevel
       uint32 reqskill
       uint32 reqskillvalue
       uint32 prev_id
       uint32 unk3
       uint32 unk4
   }
   string title


   enum TrainerType 
   {
      TRAINER_TYPE_CLASS             = 0,
      TRAINER_TYPE_MOUNTS            = 1,
      TRAINER_TYPE_TRADESKILLS       = 2,
      TRAINER_TYPE_PETS              = 3
   };