[ODE] fixed point ode

[wesa aapro]

> > the objects move and rotate ok, collision detection seems to work, but
> > the problem is that joints are not working correctly. i assume that
> > 32bit fixed point is not enough...
>
> What do the joints do?  Are they failing to hold objects together,
> oscillating, or... ?

collision joint lets the objects pass through, and ball joint fails to hold
them together. but collision joint started (more or less) working when i
changed the mass of the objects to 0.001. so it is propably a force related
problem.

wesa.