tests: fix virtio-scsi-test leak

Spotted by ASAN.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

tests/virtio-scsi-test.c

@@ -63,7 +63,7 @@ static void qvirtio_scsi_pci_free(QVirtIOSCSI *vs)
         qvirtqueue_cleanup(vs->dev->bus, vs->vq[i], vs->qs->alloc);
     }
     qvirtio_pci_device_disable(container_of(vs->dev, QVirtioPCIDevice, vdev));
-    g_free(vs->dev);
+    qvirtio_pci_device_free((QVirtioPCIDevice *)vs->dev);
     qvirtio_scsi_stop(vs->qs);
     g_free(vs);
 }