Clarify code
Clarify code

Better to use arg_wanted_prefix_len since it's more clear.

SpriteLink/NIPAP,bbaja42/NIPAP,ettrig/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,garberg/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,plajjan/NIPAP,plajjan/NIPAP,ettrig/NIPAP,SpriteLink/NIPAP,plajjan/NIPAP,plajjan/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,garberg/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,garberg/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,plajjan/NIPAP,bbaja42/NIPAP,SoundGoof/NIPAP