Krita shared pointers usage

[Dmitry Kazakov]

| Well as Cyrille was saying it has to be fixed making a check, but since
there's already a copy constructor for weak -> shared, shouldn't we use
that and just put the check before referencing (and if the weak pointer is
invalid setting the shared pointer to NULL)?

Yep, the copy c-tor is a good place.



-- 
Dmitry Kazakov
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