Don't convert INT64_MAX start index into zero (#84509)
I... don't understand why we did it this way in the first place?
Source: https://github.com/pytorch/pytorch/pull/48719/files#r962087365
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/84509
Approved by: https://github.com/ngimel
