[libcxx-commits] [libcxx] [libcxx] Align allocation to match `__set_long_cap` and `__get_long_cap` (PR #90292)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 commented:

To unblock landing #83774 I'm happy with this patch if you remove the `_LIBCPP_ASSERT_INTERNAL` (since it may not actually be correct) and change `__guess += 2` to `__guess += __endian_factor`.

https://github.com/llvm/llvm-project/pull/90292