message: Fix bug in RT_HexahedronElement::ProjectIntegrated
diff: @@ -11442,7 +11442,7 @@ void RT_HexahedronElement::ProjectIntegrated(VectorCoefficient &vc,
  for (int q = 0; q < nqpt; q++)
  {
  const IntegrationPoint &ip2d = ir2d.IntPoint(q);
  - if (c == 0) { ip3d.Set3(cp[i], cp[j] + h1*ip2d.x, cp[j] + h2*ip2d.y); }
  + if (c == 0) { ip3d.Set3(cp[i], cp[j] + h1*ip2d.x, cp[k] + h2*ip2d.y); }
  else if (c == 1) { ip3d.Set3(cp[i] + h1*ip2d.x, cp[j], cp[k] + h2*ip2d.y); }
  else { ip3d.Set3(cp[i] + h1*ip2d.x, cp[j] + h2*ip2d.y, cp[k]); }
  Trans.SetIntPoint(&ip3d);
  