vhost-user-scsi: also free the gtree

Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>

contrib/vhost-user-scsi/vhost-user-scsi.c

@@ -693,6 +693,7 @@ static void vdev_scsi_free(vhost_scsi_dev_t *vdev_scsi)
     }
 
     g_main_loop_unref(vdev_scsi->loop);
+    g_tree_destroy(vdev_scsi->fdmap);
     g_free(vdev_scsi);
 }