Aliens can spit through full tile windows.

[Moonloon]

Bug Description:
Aliens can spit through full tile windows, at least when there's no grille under it. I tested this as a Praetorian, unsure if class affects it. Only used the heavier acid globs.

Steps to reproduce:
1.Be Praetorian/Spitter/Sentinel
2.Stand next to a full tile window with no grille, like the ones in the cafeteria on the ground.
3. Spit at any tile beyond it. Laugh as the marines who thought they were safe get acid goop in the face.

[MauroVega]

the same with guns and bullets,take as example chemitry if you shoot at the ladder from the hallway the bullets ignore the first window and break the 2 one,this is caused by the new bullet trajectorys

[Infernus]

Will be fixed with Abby's upcoming projectile rewrite.