funcSig to use recursive type resolving (AST) rather than lexical parsing

[shayanb]

I used the funcSigs and found out there’s a discrepancy between what it shows and what it should be:

function _executeActionsFromFL(Task memory _currTask, bytes32 _flAmount)

Which SVA shows as : 4517bb07 => _executeActionsFromFL(Task,bytes32)

But the actual func signature that calls this function as the callback is: 0xd6741b9e

Apparently, the struct that is in the function argument (abi) should be expanded.

    struct Task {
        string name;
        bytes[][] callData;
        bytes[][] subData;
        bytes32[] actionIds;
        uint8[][] paramMapping;
    }

Something like: "_executeActionsFromFL((address,address,uint256,...),bytes32)"

[tintinweb]

related to #77