[RFC] libx86 - AMD64 fix-ups

[Matthew Garrett]

Hm. Do any of these warnings result in errors? As far as I can tell, the 
functionality of the code makes it basically impossible for the to be 
issues. The most concerning looking one (assigning a pointer to the 
stack segment register) will result in it blowing up if the pointer is 
to memory about 1MB /anyway/, so casting will remove the warning but not 
actually catch anything that would cause functionalty issues.

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Matthew Garrett | mjg59 at srcf.ucam.org