[Lazarus] formatfloat negative zero (-0)

[Andrea Mauri]

> I thing it would worth mentioning Delphi's behavior?

I mentioned Delphi behaviour, it is the reason that it is considered a 
bug and not a feature..

> And the bug report is also missing a patch to fix the problem :)

I know. I reported the bug but sorry but I am not able to provide a 
patch, I used the bugtracker as a bugtracker, I highlighted the bug ;-)