g_debug("GritsPluginTest: dispose");
GritsPluginTest *test = GRITS_PLUGIN_TEST(_test);
if (test->viewer) {
- grits_viewer_remove(test->viewer, test->marker);
+ grits_viewer_remove(test->viewer, GRITS_OBJECT(test->marker));
g_object_unref(test->viewer);
test->viewer = NULL;
}