Vesting interest is not reset to 0 in case there is no interest in LoopedVault11::updateTotalAssets()

Description:

LoopedVault1_1::_updateTotalAssets() doesn't set to 0 vesting interest when vestingInterestPreFee is null, so the new period will be vesting with the interest from the previous period. This is highly unlikely given that some interest should always accrue.

Recommended Mitigation:

Set the vesting interest to 0 when the new interest is 0.

0xSimao:

Fixed in #ad00401.