Invite fees in FairLauncher::_calInviteFees() may be 0, in which case storage update could be skipped
Description
In FairLauncher::_calInviteFees(), state updates are skipped if the directInviter is address(0), but they could also be skipped if the amount is null, which happens after the hard cap is reached.
Recommendation
Skip storage slot updates if the amount is null.
Status
Acknowledged