Log Message:
-----------
Improve C99 compatiblity.  Use directly calculated offsets into the supplied buffer.
Obtained from: FreeBSD
Modified Files:
--------------
    src/lib/libc/gen:
        __xuname.c (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/lib/libc/gen/__xuname.c?r1=1.3&r2=1.4)