Try to fix "error C2131: expression did not evaluate to a constant"
Try to fix "error C2131: expression did not evaluate to a constant"

For MSVC 2019 being just a constexpr is not enough.

libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl