Bug [minor] convering dust bunnies into dirt or granite at Dr Gordon doesn't decrement dust bunnies amounts

[Malibu Stacey]

As title. Was making the stuff needed on a multi so I can get it the earthenware muffin tin and noticed the amount of dust bunnies listed in inventory and recent wasn't changed when converting them.

Very minor issue. I doubt this will affect anyone doing anything just reporting it for completeness.