mktime crashes pike on NT

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=3855

Reported by Marcus Wellhardh wellhard@roxen.com

The following test crashes pike on windows:

C:\Roxen CMS\4.0\server-4.0.296\pike\bin>pike
Pike v7.4 release 240 running Hilfe v3.5 (Incremental Pike Frontend)
> mktime((["sec":0,"min":0,"hour":0,"mday":1,"mon":0,"year":1900-1934]));