mpi/src/starpu_mpi.c: fix field name

mpi/src/starpu_mpi.c

@@ -524,7 +524,7 @@ static void _starpu_mpi_irecv_data_func(struct _starpu_mpi_req *req)
 	if (req->sync)
 	{
 		_STARPU_MPI_COMM_FROM_DEBUG(req->count, req->datatype, req->node_tag.rank, _STARPU_MPI_TAG_SYNC_DATA, req->node_tag.data_tag, req->node_tag.comm);
-		req->ret = MPI_Irecv(req->ptr, req->count, req->datatype, req->node_tag.rank, _STARPU_MPI_TAG_SYNC_DATA, req->node_tag.comm, &req->request);
+		req->ret = MPI_Irecv(req->ptr, req->count, req->datatype, req->node_tag.rank, _STARPU_MPI_TAG_SYNC_DATA, req->node_tag.comm, &req->data_request);
 	}
 	else
 	{