Sub 1 dmg electric attacks don't cause flinch when attacking non-yet-statused targets

[WhenTanksFly]

(split from #799) The altfire of Prototype Rifle and the beta Stun Grenades do not cause the drone hurt animation to play, unless hit directly or the target was already afflicted with burning or shock. Tesla Cannon, Electric Armor and Tesla Coil do not suffer from this issue.

It may also be related that P-Rifle's altfire is both electric and explosive (judging from 2 damage to doors VS 1 to aliens, as well as extended stats' "Blast damage..." in place of expected "Shock damage...").