Don't fail `send_all` retaining reserves for 0 channels #540

tnull merged 3 commits intolightningdevkit:mainlightningdevkit/ldk-node:mainfrom

tnull:2025-05-fix-sendall-retaining-reserve-for-dusttnull/ldk-node:2025-05-fix-sendall-retaining-reserve-for-dustCopy head branch name to clipboard