message: use consistent zero assignment in common kernels
diff: @@ -72,12 +72,8 @@ void initialize(std::shared_ptr<const DefaultExecutor> exec,
  }
  r(row, col) = b(row, col);
  r2(row, col) = b(row, col);
  - z(row, col) = zero(z(row, col));
  - p(row, col) = zero(p(row, col));
  - q(row, col) = zero(q(row, col));
  - z2(row, col) = zero(z2(row, col));
  - p2(row, col) = zero(p2(row, col));
  - q2(row, col) = zero(q2(row, col));
  + z(row, col) = p(row, col) = q(row, col) = z2(row, col) =
  + p2(row, col) = q2(row, col) = zero(z(row, col));
  },
  b->get_size(), b, compact(r), compact(z), compact(p), compact(q),
  vector(prev_rho), vector(rho), compact(r2), compact(z2), compact(p2),
  