tests: fixed a leak in lv2ftpd

tests/lv2ftpd.c

@@ -203,10 +203,13 @@ static int __dir_open(void *m, sexp_t *sx)
   DIR *dp = NULL;
   if ( !(dp = opendir(dir_name)) ) {
     pthread_rwlock_unlock(&_lock);
-    free(item);
+    FREE(item);
+    FREE(dir_name);
     return sxmsg_return(msg, SNE_FAILED);
   }
 
+  FREE(dir_name);
+
   /* init stream */
   item->dsid = _rd_last_id;
   item->dp = dp;