event: Verify log_facility is not NULL before using it.

static void

spdk_app_config_dump_global_section(FILE *fp)

{

	const char *log_facility;

	if (NULL == fp)

		return;

	log_facility = spdk_get_log_facility();

	assert(log_facility != NULL);

	fprintf(fp, GLOBAL_CONFIG_TMPL,

		spdk_app_get_core_mask(), spdk_trace_get_tpoint_group_mask(),

		spdk_get_log_facility());

		log_facility);

}

int