[libpulse-binding] Use After Free in libpulse-binding

An issue was discovered in the libpulse-binding crate before 1.2.1 for Rust. get_context can cause a use-after-free.
References

https://nvd.nist.gov/vuln/detail/CVE-2018-25028
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libpulse-…