GM:PlayerClassChanged
Description
This is used internally - although you're able to use it you probably shouldn't.
Called whenever a player's class is changed on the server-side with player_manager.SetPlayerClass.
Arguments
2 number newID
The network ID of the player class's name string, or
0
if we are clearing a player class from the player.
Pass this into util.NetworkIDToString to retrieve the proper name of the player class.