Gravitational Staff has arcane damage when using Channel sta

[jdisk]

Hello,

not sure if this is a bug or intended, but it just seems wrong.

Using Channel Staff on the Gravitational Staff gives arcane damage. As far as I can see, that is because its DamageType is GRAVITYPIN and in staff-combat.lua that damagetype is unknown, thus the default (arcane) is used and that redefines the damagetype as well.

I am to lazy to check if self:projectile works with GRAVITYPIN, but if not either physical or temporal damage would make more sense lorewise.