device/queue: fix clippy warning 
diff --git a/lib/src/device/queue.rs b/lib/src/device/queue.rs index 9a42ce1..e2a5e42 100644 --- a/lib/src/device/queue.rs +++ b/lib/src/device/queue.rs 
@@ -436,7 +436,7 @@    fn free_buffers(self) -> Result<FreeBuffersResult<D, Self>, ioctl::ReqbufsError> {  let type_ = self.inner.type_; - ioctl::reqbufs(&self.inner, type_, self.state.memory_type.into(), 0)?; + ioctl::reqbufs::<()>(&self.inner, type_, self.state.memory_type.into(), 0)?;    debug!("Freed all buffers on {} queue", type_);