lnworker: fix 'channel details' with stuck htlc
lnworker: fix 'channel details' with stuck htlc

wakiyamap/electrum-mona,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,spesmilo/electrum,vialectrum/vialectrum,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,pooler/electrum-ltc,vialectrum/vialectrum,pooler/electrum-ltc,vialectrum/vialectrum,spesmilo/electrum