fixed len of None packet
fixed len of None packet

ddworken/pyethereum,ethereum/pyethereum,karlfloersch/pyethereum,ebuchman/daoist_protocol,ethers/pyethereum,ebuchman/daoist_protocol,ethermarket/pyethereum,ethereum/pyethereum,shahankhatch/pyethereum,shahankhatch/pyethereum,pipermerriam/pyethereum,inzem77/pyethereum,jnnk/pyethereum,pipermerriam/pyethereum,holiman/pyethereum,ckeenan/pyethereum,harlantwood/pyethereum,karlfloersch/pyethereum,vaporry/pyethereum