audio/lewton: : Fix build with rust 1.89.0

error: implicit autoref creates a reference to the dereference of a raw pointer

--> src/capi.rs:125:2

error: implicit autoref creates a reference to the dereference of a raw pointer

--> src/capi.rs:133:2

PR: 288923

Approved by: portmgr (build fix blanket)