[syslinux] reboot from com32

[H. Peter Anvin]

H. Peter Anvin wrote:
> Miguel wrote:
>> Theory #2
>>
>> Confirm that the stack location of the target address is correct:
>>
>>            mov eax,[esp+10*4]              ; CS:IP
>>
>> BUT ... if that wasn't correct then _farcall would never have worked.
> 
> It's not a given that it ever has worked.
> 

In fact, the an off-by-one error in the library code meant it pretty 
much hadn't.

I have fixed it and pushed it out as 3.52-pre6.

	-hpa