Cancelling gene booth stocking does nothing

[CosmonautButt]

I've noticed a couple of times during my rounds playing geneticist that trying to cancel in the middle of stocking something into the gene booth actually doesn't do anything. It still stocks the selected gene and still spends the material for it.

[phyvo]

I have a patch to fix this here:

https://forum.ss13.co/showthread.php?tid=14198