[fpc-pascal] gtree - Freeing a nil Root without error

[Daniel Gaspary]

On Tue, Jan 7, 2014 at 6:27 PM, Marco van de Voort <marcov at stack.nl> wrote:
> Free only calls the destructor if self isn't nil.

Thank you, Marco.

I was searching in stl package for a "Graph" type. is there such type?