fixed access to tx.error in case tx is None
fixed access to tx.error in case tx is None

aasiutin/electrum,procrasti/electrum,procrasti/electrum,fireduck64/electrum,argentumproject/electrum-arg,vertcoin/electrum-vtc,argentumproject/electrum-arg,cryptapus/electrum-myr,fujicoin/electrum-fjc,cryptapus/electrum-myr,spesmilo/electrum,dabura667/electrum,wakiyamap/electrum-mona,vialectrum/vialectrum,aasiutin/electrum,lbryio/lbryum,protonn/Electrum-Cash,imrehg/electrum,cryptapus/electrum-uno,pooler/electrum-ltc,vertcoin/electrum-vtc,cryptapus/electrum-uno,fyookball/electrum,dashpay/electrum-dash,asfin/electrum,cryptapus/electrum-myr,romanz/electrum,spesmilo/electrum,molecular/electrum,neocogent/electrum,protonn/Electrum-Cash,vertcoin/electrum-vtc,fujicoin/electrum-fjc,romanz/electrum,cryptapus/electrum,pooler/electrum-ltc,fireduck64/electrum,imrehg/electrum,aasiutin/electrum,cryptapus/electrum-myr,asfin/electrum,fireduck64/electrum,wakiyamap/electrum-mona,procrasti/electrum,procrasti/electrum,pknight007/electrum-vtc,spesmilo/electrum,wakiyamap/electrum-mona,FairCoinTeam/electrum-fair,cryptapus/electrum-uno,FairCoinTeam/electrum-fair,dabura667/electrum,molecular/electrum,neocogent/electrum,vialectrum/vialectrum,fujicoin/electrum-fjc,FairCoinTeam/electrum-fair,pknight007/electrum-vtc,kyuupichan/electrum,fyookball/electrum,protonn/Electrum-Cash,asfin/electrum,vialectrum/vialectrum,digitalbitbox/electrum,romanz/electrum,cryptapus/electrum,neocogent/electrum,digitalbitbox/electrum,FairCoinTeam/electrum-fair,wakiyamap/electrum-mona,imrehg/electrum,protonn/Electrum-Cash,pooler/electrum-ltc,molecular/electrum,digitalbitbox/electrum,molecular/electrum,dashpay/electrum-dash,dabura667/electrum,pooler/electrum-ltc,cryptapus/electrum-uno,fireduck64/electrum,kyuupichan/electrum,cryptapus/electrum,argentumproject/electrum-arg,vertcoin/electrum-vtc,pknight007/electrum-vtc,dashpay/electrum-dash,digitalbitbox/electrum,dabura667/electrum,kyuupichan/electrum,lbryio/lbryum,argentumproject/electrum-arg,dashpay/electrum-dash,pknight007/electrum-vtc,aasiutin/electrum,imrehg/electrum,fyookball/electrum,spesmilo/electrum