iio: event_monitor: Fix missing free in main
Free string allocated by asprintf().
Signed-off-by: zhang jiao <zhangjiao2@cmss.chinamobile.com>
Link: https://patch.msgid.link/20240904080533.104279-1-zhangjiao2@cmss.chinamobile.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by