[csv-sniffer] Use of Uninitialized Resource in csv-sniffer.

An issue was discovered in the csv-sniffer crate through 2021-01-05 for Rust. preamble_skipcount may read from uninitialized memory locations.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-45686
• https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/csv-sniffer/RUSTSEC-2021-0088.md
• https://rustsec.org/advisories/RUSTSEC-2021-0088.html
• https://github.com/jblondin/csv-sniffer/pull/2
• https://github.com/advisories/GHSA-9783-42pm-x5jq