missing check for ERC20.decimal call

[Shihao Xia]

in solmate/src/mixins/ERC4626.sol:38

constructor(
        ERC20 _asset,
        string memory _name,
        string memory _symbol
    ) ERC20(_name, _symbol, _asset.decimals()) {              // line 38
        asset = _asset;
    }

The return value of the _asset.decimals() should be checked according to
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md#decimals

This method can be used to improve usability, but interfaces and other contracts MUST NOT expect these values to be present.

[t11s]

yeahhh aware of this but in practice everyone uses decimals. there's no downside here to using it, if the token is weird it forces u to be aware of that and modify slightly.