fillZrxQuote doesn't return correct values when zrxSellTokenAddress == zrxBuyTokenAddress

Handle harleythedog Vulnerability details Impact Suppose that swapByQuote is called with zrxSellTokenAddress == zrxBuyTokenAddress, and neither of these addresses "signifiesETHOrZero". The contract first transfers amountToSell of these tokens from the sender's account into the contract and update...