Emptying the Gadgetron vendor has a crash-prone behavior

[Dinopony]

When you buy all stuff from the Gadgetron vendor, the last slot stays there in a malformed / glitched state which can be bought a second time if player has enough bolts, crashing the game if doing so.

https://medal.tv/games/pcsx2/clips/jUhVv9gTwIqmEEuIs?invite=cr-MSx4V2EsMTc3ODI2MTc1