fbtl/posix: fix for CID 1645300

initialize all elements of the aio structure to zero by using calloc
instead of malloc

Signed-off-by: Edgar Gabriel <[email protected]>

Author: edgargabriel

ompi/mca/fbtl/posix/fbtl_posix_ipwritev.c

@@ -55,7 +55,7 @@ ssize_t  mca_fbtl_posix_ipwritev (ompio_file_t *fh,
     data->prd_req_type  = FBTL_POSIX_AIO_WRITE;
     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_ipwritev: could not allocate memory\n");