kio_sftp rewrite

[Albert Astals Cid]

> Asunto: Re: kio_sftp rewrite
> -0400, Ben Boeckel wrote:
> > free() [....] should not crash on NULL
> >
> wrong
> 

Not wrong:
[1] Linux: If ptr is NULL, no operation is performed.  
[2] SCO: If ptr is a null pointer, no action occurs
[3] Microsoft: If memblock is NULL, the pointer is ignored and free immediately returns.
[4] FreeBSD: If ptr is NULL, no action occurs.


[1] http://linux.die.net/man/3/free
[2] http://www.opengroup.org/onlinepubs/7990989775/xsh/free.html
[3] http://msdn.microsoft.com/en-us/library/we1whae7%28VS.80%29.aspx
[4] http://www.manpages.info/freebsd/free.3.html