fix request_chunk
fix request_chunk

spesmilo/electrum,cryptapus/electrum,pooler/electrum-ltc,fujicoin/electrum-fjc,neocogent/electrum,pooler/electrum-ltc,vialectrum/vialectrum,wakiyamap/electrum-mona,neocogent/electrum,cryptapus/electrum,vialectrum/vialectrum,spesmilo/electrum,wakiyamap/electrum-mona,spesmilo/electrum,spesmilo/electrum,wakiyamap/electrum-mona,fujicoin/electrum-fjc,vialectrum/vialectrum,fujicoin/electrum-fjc,wakiyamap/electrum-mona,pooler/electrum-ltc,cryptapus/electrum,neocogent/electrum,pooler/electrum-ltc