Cannot sell more than one clone at a time in vending machine

This was a change from facepunch themself, the commit was originally made 8 months ago but was only merged into main branch during last wipe.

To quote a certain someone, this may be "subject to change", I've since seen another commit subtracting the merge so this may or may not change again in the future.

Here's the original commit https://commits.facepunch.com/417933

And the subtraction https://commits.facepunch.com/440491