In /datum/component/pellet_cloud/proc/pellet_hit if the projectile's wound_bonus is CANT_WOUND, then wound_info_by_part[hit_part] never gets a value set.
This causes an issue in /datum/component/pellet_cloud/proc/finalize() where it assumes that wound_info_by_part[hit_part] has always been set to a list(x,y,z).
I added a quick if check to skip this where there's no wound info for a part.
Weapon this behaviour manifested on: DRAGnet on net mode. Due to the runtime, I didn't notice it dealing any stamina damage. This should fix that scenario as well as any other CANT_WOUND projectiles and prevent them from runtiming early.
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