🔍 Possible underflow revert in exitPool

[transmissions11]

Balance of underlying last harvest could underflow if vault lost assets and regained in between. Should either harvest no matter what or at least document that users may need to harvest before calling exit pool?

vaults/src/Vault.sol

Line 402 in 9b137fd

balanceOfUnderlyingLastHarvest[cToken] -= underlyingAmount;