fixes a money loop
fixes a money loop

:cl: 
fix: fixes a possible money exploit
/:cl:

why: if you buy the barrier crate, open it, spam all the grenades in vertical mode u ll get more money that the crate is worth
before: 4 grenades -> 12 barriers * 375 credits -> 4500 + 500 (crate) + 200 (manifest) -> 5200 which is a +3200 net gain
now:  4 grenades -> 12 barriers * 100 credits -> 1200+ 500 (crate) + 200 (manifest) -> 1900 which is a -100 net loss
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