fbtl/posix: fix for CID 1645304

initialize AIO elements to zero by using calloc

Signed-off-by: Edgar Gabriel <Edgar.Gabriel@amd.com>

Author: edgargabriel

ompi/mca/fbtl/posix/fbtl_posix_ipreadv.c

@@ -56,7 +56,7 @@ ssize_t mca_fbtl_posix_ipreadv (ompio_file_t *fh,
     data->prd_req_type  = FBTL_POSIX_AIO_READ;
     data->prd_req_chunks = ompi_fbtl_posix_max_prd_active_reqs;
     data->prd_total_len = 0;
-    data->prd_aio.aio_reqs = (struct aiocb *) malloc (sizeof(struct aiocb) *
+    data->prd_aio.aio_reqs = (struct aiocb *) calloc (sizeof(struct aiocb),
                                               fh->f_num_of_io_entries);
     if (NULL == data->prd_aio.aio_reqs) {
         opal_output(1, "mca_fbtl_posix_ipreadv: could not allocate memory\n");