message: blockfilter: Remove default clause in switch statement.
  Now the compiler will warn if not all enums are handled in the
  switch.
diff: @@ -250,13 +250,10 @@ bool BlockFilter::BuildParams(GCSFilter::Params& params) const
  params.m_siphash_k1 = m_block_hash.GetUint64(1);
  params.m_P = BASIC_FILTER_P;
  params.m_M = BASIC_FILTER_M;
  - break;
  -
  - default:
  - return false;
  + return true;
  }
  - return true;
  + return false;
  }
  uint256 BlockFilter::GetHash() const
  