lnhtlc.discard_unsigned_remote_updates: fix edge case
lnhtlc.discard_unsigned_remote_updates: fix edge case

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