https://github.com/code-423n4/2023-10-badger/blob/main/packages/contracts/contracts/LiquidationLibrary.sol#L863
_redistributeDebt will never be called if debt = 0.
https://github.com/code-423n4/2023-10-badger/blob/main/packages/contracts/contracts/LiquidationLibrary.sol#L525-L527
