Levels up an NPC to appropriate PC henchman level.
PC to level up in accordance with.
NPC to perform the leveling up of. (Default: OBJECT_SELF)
Levels up oHenchman to 1 level less than oPC.
All local variables kept on the henchman are not lost. These are copied to the PC before the henchman is destroyed and respawned as a new higher level henchman, then retrieved.
NOTE: x0_i0_henchman also contains a function with this exact same name and parameters. However, the x0_i0_henchman version should not be used as all it does is return OBJECT_INVALID.
author: Charles Feduke, editor: Mistress