Added damage from perks bypasses immunities

[copyrite]

Perks like Needle Grenades and Boosted Cores allow grenades to bypass Fortress. Another one from Mod Jam (thus not reproducible in base LWOTC) is Center Mass applying to a Chemthrower, bypassing fire immunity.

The amount of damage dealt is equal to the bonus damage from perks, so a Needle Grenades + Boosted Cores hit on a Fortress unit would deal 2 (before falloff), and a Center Mass Chemthrower attack on a fire immune unit would deal 1.

There was an earlier bug where Blood Trail applied to things like Flashbangs, maybe something from that fix can be repurposed for this one.

https://discord.com/channels/590853492084572170/1189278715289554964/1189278715289554964