message: fix mips flow.rs build error
  ref
diff: @@ -55,7 +55,7 @@ impl FlowStat {
  /// Received bytes count
  #[cfg(any(target_arch = "mips", target_arch = "powerpc"))]
  pub fn rx(&self) -> u64 {
  - self.rx.load(Ordering::Relaxed) as u32
  + self.rx.load(Ordering::Relaxed) as u64
  }
  /// Increase received bytes
  