libcrun: standardize error code after yajl_gen_alloc() failure

[eriksjolund]

The libcrun source code sometimes use 0 and sometimes errno as error code after yajl_gen_alloc() failures.
Use 0 everywhere.

[gemini-code-assist]

Summary of Changes

Hello @eriksjolund, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to improve the consistency of error handling within the libcrun library. By standardizing the error code returned when yajl_gen_alloc() fails, the change ensures that a uniform error value is used, simplifying error interpretation and potentially preventing discrepancies in how allocation failures are reported.

Highlights

• Error Code Standardization: Standardized the error code returned upon yajl_gen_alloc() failure from errno to 0 across libcrun to ensure consistent error reporting.

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[gemini-code-assist]

Code Review

This pull request standardizes the error code to 0 for yajl_gen_alloc() failures, which is a good practice since errno is not guaranteed to be set by memory allocation functions. The changes are correct. I have added one suggestion to improve an error message for consistency and correctness.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

TMT tests failed. @containers/packit-build please check.

[giuseppe]

LGTM