graphical bug for compound models

[sezero]

This was reported for malice and airquake by user 'ranger' at:
https://celephais.net/board/view_thread.php?id=60452&start=3930
He reports that ironwail and vkquake have the same issue, too,
and claims that it has something to do with MOVETYPE_?? stuff.
I can't test this, so creating a ticket here.

CC @andrei-drexler, @Novum, @vsonnier, @ericwa, @j0zzz, @Shpoike