message: Index: Improve logging in coinstatsindex
  More accurate logging of a warning should make clear if the recovery condition was hit while catching the results of the previous block.
diff: @@ -122,9 +122,12 @@ bool CoinStatsIndex::WriteBlock(const CBlock& block, const CBlockIndex* pindex)
  uint256 expected_block_hash{pindex->pprev->GetBlockHash()};
  if (read_out.first != expected_block_hash) {
  + LogPrintf("WARNING: previous block header belongs to unexpected block %s; expected %s\n",
  + read_out.first.ToString(), expected_block_hash.ToString());
  +
  if (!m_db->Read(DBHashKey(expected_block_hash), read_out)) {
  - return error("%s: previous block header belongs to unexpected block %s; expected %s",
  - __func__, read_out.first.ToString(), expected_block_hash.ToString());
  + return error("%s: previous block header not found; expected %s",
  + __func__, expected_block_hash.ToString());
  }
  }
  @@ -392,9 +395,12 @@ bool CoinStatsIndex::ReverseBlock(const CBlock& block, const CBlockIndex* pindex
  uint256 expected_block_hash{pindex->pprev->GetBlockHash()};
  if (read_out.first != expected_block_hash) {
  + LogPrintf("WARNING: previous block header belongs to unexpected block %s; expected %s\n",
  + read_out.first.ToString(), expected_block_hash.ToString());
  +
  if (!m_db->Read(DBHashKey(expected_block_hash), read_out)) {
  - return error("%s: previous block header belongs to unexpected block %s; expected %s",
  - __func__, read_out.first.ToString(), expected_block_hash.ToString());
  + return error("%s: previous block header not found; expected %s",
  + __func__, expected_block_hash.ToString());
  }
  }
  }
  