fix: tx size estimation for multisig
fix: tx size estimation for multisig

digitalbitbox/electrum,pooler/electrum-ltc,kyuupichan/electrum,fujicoin/electrum-fjc,fujicoin/electrum-fjc,vialectrum/vialectrum,romanz/electrum,pooler/electrum-ltc,asfin/electrum,cryptapus/electrum,pooler/electrum-ltc,neocogent/electrum,romanz/electrum,fujicoin/electrum-fjc,wakiyamap/electrum-mona,spesmilo/electrum,cryptapus/electrum,asfin/electrum,wakiyamap/electrum-mona,neocogent/electrum,pooler/electrum-ltc,digitalbitbox/electrum,digitalbitbox/electrum,digitalbitbox/electrum,kyuupichan/electrum,wakiyamap/electrum-mona,spesmilo/electrum,neocogent/electrum,vialectrum/vialectrum,vialectrum/vialectrum,spesmilo/electrum,wakiyamap/electrum-mona,cryptapus/electrum,kyuupichan/electrum,asfin/electrum,spesmilo/electrum,romanz/electrum