• Minecraft version 1.14.3
• CC: Tweaked version cc-tweaked-1.14.3-1.83.1
• Detailed reproduction steps: Put a stack of coal in a turtle that only needs 2-3 coal then refuel all, it consumes the entire stack.

Expected behavior- eat what it can use and leave the rest.

Hrmr, this appears to be an issue in the original ComputerCraft too, so at least it's not a regression as part of the update.

I guess the best thing to do here would be to refuel one item, and use that as a guess for how many more we need.

This fixes it #274