Both ether and a valid token address might be sent to postBounty function

[subramanianv]

https://github.com/gitcoinco/smart_contracts/blob/9100e1cfde32fcc7a45ec5cfbc11df5bf8d36699/contracts/bounty/BountyIndex.sol#L69

if the token address is a valid address along with it some ether is sent, the ether would be stuck up in the smart contract.

If its a valid address, after the transferFrom function ether might have to be transferred back to the caller.

Not a serious bug !

[owocki]

Thanks for pointing this out.