Patch for crash on closing

[Boudewijn Rempt]

On Friday 23 October 2009, Sven Langkamp wrote:
> Hi,
> 
> after my patch from yesterday all KOffice apps are now crashing on closing.
> The problem is that the registry deletes the colospaces in the destructor
> and the colorspace use the registry to get the cache.
> The patch change the behavior so that colorspaces owned by the registry
> don't delete the cached conversion themself. Instead this is done with the
> destruction of the cache.
> 
> Can you have a look at it?

That look ok. I think it was for the same reason that I added the check 
in the first place.
-- 
Boudewijn Rempt | http://www.valdyas.org