lnworker: fix amount_inflight. (amount with routing fees were used on htlc failures)
lnworker: fix amount_inflight.
(amount with routing fees were used on htlc failures)

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