fix race condition with channel_timestamps
fix race condition with channel_timestamps

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