Unaligned block moves and MEM_ALIGN re-broken

[David Edelsohn]

	Yes, that patch returns to the expected behavior.  I am a little
concerned what other problems are going to show up with this patch which
now is going to make a lot of objects appear much less aligned. 

	I believe that there currently is a bootstrap problem with x86
according to the regressions tester.  This patch needs to be thoroughly
regression tested.

David