cover the opts_size examination Change-Id: I8058f1db98713b5f19151b1b127180ae5ec58b96 Signed-off-by: JinYu <jin.yu@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453944 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>