message: fixed compile error for OpenImageIO 1.x
diff: @@ -179,7 +179,7 @@ namespace oidn {
  in->close();
  #if OIIO_VERSION < 10903
  - ImageInput::destroy(in);
  + OIIO::ImageInput::destroy(in);
  #endif
  return buf;
  }
  @@ -202,7 +202,7 @@ namespace oidn {
  out->close();
  #if OIIO_VERSION < 10903
  - ImageOutput::destroy(out);
  + OIIO::ImageOutput::destroy(out);
  #endif
  }
  #endif
  