Backport of timegm.c segfault fix

[Jeremy Allison]

On Mon, Oct 23, 2006 at 12:20:59AM +0200, Joakim Plate wrote:
> Hi, 
> 
> I heads up for whoever handles backporting. The lib/replace/timegm.c has
> been fixed in samba4, however it hasn't been backported to samba3. It still
> segfaults there on invalid dates (month negative) wich gets handed from some
> servers (landrives in particular). 

I've backported to all samba3 branches.

Thanks,

	Jeremy.