message: Fixing invalid merkle calculation for no accepted transactions.
diff: @@ -348,6 +348,10 @@ signed_block chain_controller::_generate_block(
  edump((e.to_detail_string()));
  }
  }
  +
  + // need to clean up if none of the pending transactions were accepted
  + if (!pending_block.cycles[0][0].user_input.size())
  + pending_block.cycles.clear();
  }
  if( pending.size() )
  