topics are added as zpad32 to bloom. but why?
topics are added as zpad32 to bloom. but why?

ethereum/pyethereum,pipermerriam/pyethereum,karlfloersch/pyethereum,inzem77/pyethereum,ethereum/pyethereum,ddworken/pyethereum,ethermarket/pyethereum,vaporry/pyethereum,shahankhatch/pyethereum,shahankhatch/pyethereum,harlantwood/pyethereum,karlfloersch/pyethereum,ckeenan/pyethereum,holiman/pyethereum,pipermerriam/pyethereum