channeldb/invoice: only allow pay-addr lookup w/ no query hash #5209
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This PR fixes a regression introduced in #5108.
Without this check, it's possible to send a probe HTLC w/ a valid
payment address but invalid payment hash that gets settled. Because
there was no assertion that the HTLC's payment hash matches the
invoice, the link would fail when it receives an invalid preimage for
the HTLC on its commitment.