FS-10167: Missing NULL assignment to alloc list during cleanup, tests run on linux.

libs/libks/src/ks_pool.c

@@ -576,6 +576,7 @@ KS_DECLARE(ks_status_t) ks_pool_clear(ks_pool_t *pool)
 		// @todo check_prefix()? still want to clear out properly if some has been cleared though, not leak memory if there has been corruption
 		free(prefix);
 	}
+	pool->first = pool->last = NULL;
 
 	ks_mutex_unlock(pool->mutex);