message: Fix warning for compilation libindy on MacOS.
diff: @@ -209,7 +209,7 @@ impl CatchupHandler {
  }
  fn catchup_step(&mut self, catchup: CatchupRep, node_idx: usize) -> Result<CatchupStepResult, PoolError> {
  - let mut process = self.pending_catchup.as_mut()
  + let process = self.pending_catchup.as_mut()
  .ok_or(CommonError::InvalidState("Process non-existing CatchUp".to_string()))?;
  process.pending_reps.push((catchup, node_idx));
  