[svn r292] Fixed: string switch was broken in several ways. Fixed: TypeInfo_Typedef.next was incorrect (return base of base instead of just base). Fixed: ClassInfo offset type info (offTi) had invalid offsets.

char* toStringz (char[] s)
{
        if (s.ptr)
            if (! (s.length && s[$-1] is 0))
                   s = s ~ '\0';
        return s.ptr;
}