fix: vx_struct_fields_field_dtype takes usize instead of u64

[robert3005]

fix #5391

Signed-off-by: Robert Kruszewski github@robertk.io

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.98%. Comparing base (28f0989) to head (2fcee0e).
⚠️ Report is 5 commits behind head on develop.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[codspeed-hq]

CodSpeed Performance Report

Merging #5396 will improve performances by 16.01%

_{Comparing rk/ffifixes (2fcee0e) with develop (dc03c4f)}

Summary

⚡ 1 improvement
✅ 1427 untouched
⏩ 666 skipped¹
🗄️ 28 archived benchmarks run²

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	encode_specialized	1.2 ms	1.1 ms	+16.01%

Footnotes

1. 666 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. 28 benchmarks were run, but are now archived. If they were deleted in another branch, consider rebasing to remove them from the report. Instead if they were added back, click here to restore them. ↩

[robert3005]

thanks @a10y