_testexternalinspection.c doesn't check for undefined TARGET_OS_OSX

[jmroot]

Bug report

Bug description:

Similar to #117886, TARGET_OS_OSX is not defined by older macOS SDKs, and the code doesn't distinguish between it being undefined and being defined to 0.

CPython versions tested on:

3.13

Operating systems tested on:

macOS

Linked PRs

• gh-117891: handle undefined TARGET_OS_OSX #117892

[ned-deily]

Thanks again for the issue. As discussed in the associated PR #117887, the suggested change has been rolled up and merged in PR #118073.