Make a destructor virtual.

The class has virtual functions so we get a warning if we don't do it.

diff --git a/include/deal.II/base/mpi.h b/include/deal.II/base/mpi.h
index dac995371a3baa58d0300c9f7d1d77d6ddd64648..d2193cad2c53b0ba9870a3bce1c3ec7c38d5ae24 100644 (file)
--- a/include/deal.II/base/mpi.h
+++ b/include/deal.II/base/mpi.h
@@ -738,6 +738,11 @@ namespace Utilities
     class ConsensusAlgorithmProcess
     {
     public:
+      /**
+       * Destructor.
+       */
+      virtual ~ConsensusAlgorithmProcess() = default;
+
       /**
        * @return A vector of ranks this process wants to send a request to.
        *