test-qobject-input-visitor: Abort earlier on bad test input

visitor_input_test_init_internal() parses test input with
qobject_from_jsonv(), and asserts it succeeds.  Pass &error_abort for
good measure.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Message-Id: <1488317230-26248-12-git-send-email-armbru@redhat.com>

tests/test-qobject-input-visitor.c

@@ -51,7 +51,7 @@ static Visitor *visitor_input_test_init_internal(TestInputVisitorData *data,
 {
     visitor_input_teardown(data, NULL);
 
-    data->obj = qobject_from_jsonv(json_string, ap, NULL);
+    data->obj = qobject_from_jsonv(json_string, ap, &error_abort);
     g_assert(data->obj);
 
     if (keyval) {