Patch for deleting tiles when commands are deleted from the undo stack

[Dmitry Kazakov]

>
> On Sunday 21 March 2010, Cyrille Berger wrote:
> > First, I thought it would be solved by my previous patch, because for
> some
> > reason I thought there was transaction created, but it appears it is not
> > the case. So now I am not too sure what is causing the problem.
> I found the "reason", in kis_async_merger.h, if I comment:
> 245:            parentOriginal->clear(rect);
>
> then I don't have anymore memory increase. I am guessing something is not
> freeing memory like it should in the clear function... I will keep
> investigating.
>
A short look didn't find something strange in clear(). Is it actually an
"increase" of memory or only "not-decreasing"?


-- 
Dmitry Kazakov
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