Please move to elite asap, I can explain why in there.
EDIT: Theory didn't work, turns out there are no arguments for the function therefore it's not as important as I though initially for protection in the upper spire of MMowned. It's still a decent contribution, so I'll still be +repping, it's still up to you if you want it moved or not.
Double Edit: From WoWProgramming:
Code:
Was used in early betas of World of Warcraft before trainer NPCs existed. Only remaining use is equivalent to CloseTrainer().
Signature:
OpenTrainer()
This function is deprecated and is no longer in use
Seems to take nothing, returns nothing, but I can't be sure until I have a few moments to work with it.