Function zstd_sys::ZSTDMT_CCtxParam_setNbWorkers

pub unsafe extern "C" fn ZSTDMT_CCtxParam_setNbWorkers(
    params: *mut ZSTD_CCtx_params, 
    nbWorkers: c_uint
) -> usize

ZSTDMT_CCtxParam_setNbWorkers() Set nbWorkers, and clamp it. Also reset jobSize and overlapLog