Return value of a function 'rte_zmalloc' is dereferenced without
checking, and it may call segmentation fault.
This patch fixed it.
Fixes: f8be1786b1b8 ("app/crypto-perf: introduce performance test application")
Cc: stable@dpdk.org
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>