adds a single spark visual to malf ai's machine overload

[Moltijoe]

This is mainly for situations where there's several of the same type of machine in a room removes the need to just guess and hope to not get blown up if one's attentive enough especially since the explosion has a heavy size of 2

if adding a tell makes it too easy to avoid, the explosion could always be made bigger to compensate probably only increase light explosion though

Example firelocks on a shuttle

technically not an ided because someone else asked me to do it, can't remember who though

:cl:
tweak: machine overload will spawn a single spark on the exploding machine /:cl: