Fix array-bounds error

[cyyever]

Fix the following g++ error:

  In member function ‘constexpr const std::array<_Tp, _Nm>::value_type& std::array<_Tp, _Nm>::operator[](size_type) const [with _Tp = int; long unsigned int _Nm = 1]’,
      inlined from ‘fbgemm::GenConvKernelBase<SPATIAL_DIM, INST_SET>::GenConvKernelBase(const fbgemm::conv_param_t<kSpatialDim>&, int32_t, bool, bool, bool, bool, bool) [with int SPATIAL_DIM = 1; fbgemm::inst_set_t INST_SET = fbgemm::inst_set_t::avx512]’ at ../third_party/fbgemm/src/./GroupwiseConv.h:128:43:
  /usr/include/c++/14.2.1/array:219:24: error: array subscript 18446744073709551615 is above array bounds of ‘std::__array_traits<int, 1>::_Type’ {aka ‘const int [1]’} [-Werror=array-bounds=]
    219 |         return _M_elems[__n];
        |                ~~~~~~~~^
  /usr/include/c++/14.2.1/array: In constructor ‘fbgemm::GenConvKernelBase<SPATIAL_DIM, INST_SET>::GenConvKernelBase(const fbgemm::conv_param_t<kSpatialDim>&, int32_t, bool, bool, bool, bool, bool) [with int SPATIAL_DIM = 1; fbgemm::inst_set_t INST_SET = fbgemm::inst_set_t::avx512]’:
  /usr/include/c++/14.2.1/array:115:55: note: while referencing ‘std::array<int, 1>::_M_elems’
    115 |       typename __array_traits<_Tp, _Nm>::_Type        _M_elems;
        |                                                       ^~~~~~~~
  In member function ‘constexpr const std::array<_Tp, _Nm>::value_type& std::array<_Tp, _Nm>::operator[](size_type) const [with _Tp = int; long unsigned int _Nm = 1]’,
      inlined from ‘fbgemm::GenConvKernelBase<SPATIAL_DIM, INST_SET>::GenConvKernelBase(const fbgemm::conv_param_t<kSpatialDim>&, int32_t, bool, bool, bool, bool, bool) [with int SPATIAL_DIM = 1; fbgemm::inst_set_t INST_SET = fbgemm::inst_set_t::avx512_vnni]’ at ../third_party/fbgemm/src/./GroupwiseConv.h:128:43:
  /usr/include/c++/14.2.1/array:219:24: error: array subscript 18446744073709551615 is above array bounds of ‘std::__array_traits<int, 1>::_Type’ {aka ‘const int [1]’} [-Werror=array-bounds=]
    219 |         return _M_elems[__n];
        |                ~~~~~~~~^
  /usr/include/c++/14.2.1/array: In constructor ‘fbgemm::GenConvKernelBase<SPATIAL_DIM, INST_SET>::GenConvKernelBase(const fbgemm::conv_param_t<kSpatialDim>&, int32_t, bool, bool, bool, bool, bool) [with int SPATIAL_DIM = 1; fbgemm::inst_set_t INST_SET = fbgemm::inst_set_t::avx512_vnni]’:
  /usr/include/c++/14.2.1/array:115:55: note: while referencing ‘std::array<int, 1>::_M_elems’
    115 |       typename __array_traits<_Tp, _Nm>::_Type        _M_elems;
        |                                                       ^~~~~~~~
  cc1plus: all warnings being treated as errors

There was an out of bound access before fix, and that access was shortcuted by and condition. Nevertheless, it's better to fix that.

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@q10 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@q10 merged this pull request in pytorch/FBGEMM@993cd49e4bd4c39e09822efc4ad617f9d87b8b4f.