[syslinux] push-pop ordering error found in memdisk

[H. Peter Anvin]

James Ling wrote:
> H. Peter Anvin,
> 
> The following problem came to my attention with memdisk. I cannot claim the
> credit, but wanted to be sure the information made it back into the program
> for the benefit of all users...
> 
> In file memdisk.asm, in respect of the operation of the raw and bigraw
> options, the order of pop instructions does not correspond to the order
> registers are pushed;
> 

Thanks for the bug report; I have pushed out a fix as syslinux-3.32-pre7.

This basically has made raw/bigraw/safeint useless, so it would 
definitely be good if people could test it out.

	-hpa