[NTVDM]

[NTVDM]
- BIOS location must be aligned on 32bit boundaries (or 16, I have to check). This fixes BIOS images loading when they miss a (null) byte to make them (e.g.) 8192 bytes long (example: the BIOS image of windows ntvdm).
- Add useful alignment (and others) macros.

svn path=/branches/ntvdm/; revision=62312