test-string-input-visitor: Use virtual walk

We now support virtual walks, so use that instead.
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Message-Id: <20181121164421.20780-8-david@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>

tests/test-string-input-visitor.c

@@ -115,7 +115,6 @@ static void test_visitor_in_intList(TestInputVisitorData *data,
     uint64_t expect5[] = { UINT64_MAX };
     Error *err = NULL;
     int64List *res = NULL;
-    int64List *tail;
     Visitor *v;
     int64_t val;
 
@@ -188,39 +187,28 @@ static void test_visitor_in_intList(TestInputVisitorData *data,
 
     v = visitor_input_test_init(data, "0,2-3");
 
-    /* Would be simpler if the visitor genuinely supported virtual walks */
-    visit_start_list(v, NULL, (GenericList **)&res, sizeof(*res),
-                     &error_abort);
-    tail = res;
-    visit_type_int64(v, NULL, &tail->value, &error_abort);
-    g_assert_cmpint(tail->value, ==, 0);
-    tail = (int64List *)visit_next_list(v, (GenericList *)tail, sizeof(*res));
-    g_assert(tail);
-    visit_type_int64(v, NULL, &tail->value, &error_abort);
-    g_assert_cmpint(tail->value, ==, 2);
-    tail = (int64List *)visit_next_list(v, (GenericList *)tail, sizeof(*res));
-    g_assert(tail);
+    visit_start_list(v, NULL, NULL, 0, &error_abort);
+    visit_type_int64(v, NULL, &val, &error_abort);
+    g_assert_cmpint(val, ==, 0);
+    visit_type_int64(v, NULL, &val, &error_abort);
+    g_assert_cmpint(val, ==, 2);
 
     visit_check_list(v, &err);
     error_free_or_abort(&err);
-    visit_end_list(v, (void **)&res);
-
-    qapi_free_int64List(res);
+    visit_end_list(v, NULL);
 
     /* Visit beyond end of list */
+
     v = visitor_input_test_init(data, "0");
 
-    visit_start_list(v, NULL, (GenericList **)&res, sizeof(*res),
-                     &error_abort);
-    tail = res;
-    visit_type_int64(v, NULL, &tail->value, &err);
-    g_assert_cmpint(tail->value, ==, 0);
+    visit_start_list(v, NULL, NULL, 0, &error_abort);
+    visit_type_int64(v, NULL, &val, &err);
+    g_assert_cmpint(val, ==, 0);
     visit_type_int64(v, NULL, &val, &err);
     error_free_or_abort(&err);
-    visit_check_list(v, &error_abort);
-    visit_end_list(v, (void **)&res);
 
-    qapi_free_int64List(res);
+    visit_check_list(v, &error_abort);
+    visit_end_list(v, NULL);
 }
 
 static void test_visitor_in_bool(TestInputVisitorData *data,