nc_aborts exits with zero status

[Whyborn]

Change STOP statement to STOP 1 for error handling.

CABLE

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Description

The nc_abort routine calls STOP without a value. This means that the caller treats this exit as a success, but it should be a failure.

Fixes #742

Type of change

Please delete options that are not relevant.

• Bug fix

Checklist

• The new content is accessible and located in the appropriate section
• I have checked that links are valid and point to the intended content
• I have checked my code/text and corrected any misspellings

Testing

• Are the changes bitwise-compatible with the main branch? If working on an optional feature, are the results bitwise-compatible when this feature is off? If yes, copy benchcab output showing successful completion of the bitwise compatibility tests or equivalent results below this line.

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📚 Documentation preview 📚: https://cable--743.org.readthedocs.build/en/743/