default initialize MPI_Requests

src/amdis/common/parallel/Communicator.hpp

@@ -111,7 +111,7 @@ namespace Mpi
 
     Request isend(std::string const& str, int to, Tag tag = {}) const
     {
-      MPI_Request request;
+      MPI_Request request = nullptr;
       MPI_Isend(to_void_ptr(str.data()), int(str.size()), MPI_CHAR, to, tag.value, comm_, &request);
       return {request};
     }
@@ -199,7 +199,7 @@ namespace Mpi
           MPI_Get_count(&status, MPI_CHAR, &size);
 
           str.resize(size);
-          MPI_Request req;
+          MPI_Request req = nullptr;
           MPI_Irecv(&str[0], size, MPI_CHAR, status.MPI_SOURCE, status.MPI_TAG, comm, &req);
 
           return req;