Fix cppcheck warning in gs232.c

gs232a/gs232.c

@@ -378,7 +378,7 @@ const struct rot_caps f1tetracker_rot_caps =
 
     .get_position =  NULL,    /* no position feedback available */
     .set_position =  gs232_rot_set_position,
-#if 0
+#ifdef XXREMOVEDXX 
     .stop =          gs232_rot_stop,
 #endif
 };