[PATCH] free() -> xfree() substitutions

[Andrew Cagney]

> Note that the changes for mi and tui are listed in the ChangeLog entry
> below.  If anyone has objection to these changes being listed here,
> I'll move them to the ChangeLog files in the mi and tui directories. 
> (The protoization changes are listed this way though and no one
> objected.)

It is more likely no one noticed :-)  Technically they should be in the
correct ChangeLog file.

Thanks for making this change.

	Andrew