Only whitelist k4a_* functions.

build.rs

@@ -17,6 +17,7 @@ fn main() {
     let bindings = bindgen::Builder::default()
         .header("wrapper.h")
         .clang_arg(format!("-I./vendor/include/{}", consts::OS))
+        .whitelist_function("k4a.*")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks))
         .generate()
         .expect("Unable to generate bindings");