Require with empty message

[code423n4]

Handle

robee

Vulnerability details

The following requires are with empty messages.
This is very important to add a message for any require. Such that the user has enough
information to know the reason of failure:

    Solidity file: Auction.sol, In line 681 with Empty Require message.
    Solidity file: ERC20Permit.sol, In line 56 with Empty Require message.
    Solidity file: ERC20Permit.sol, In line 76 with Empty Require message.
    Solidity file: ERC20Permit.sol, In line 78 with Empty Require message.
    Solidity file: ERC20Permit.sol, In line 119 with Empty Require message.

[0xScotch]

#167

[GalloDaSballo]

Duplicate of #167