PVS-Studio warning V547 for VTK

int vtkMNIObjectReader::CanReadFile(const char* fname)
{
  ...
  if (objType == 'P' || objType != 'L' ||
      objType == 'M' || objType != 'F' ||
      objType == 'X' || objType != 'Q' ||
      objType == 'T')
  ...
}

This suspicious code was found in VTK project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression is always true. Probably the '&&' operator should be used here. vtkHybrid vtkmniobjectreader.cxx 161

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