[Midnightbsd-cvs] src: malloc.c: Fix stats printing of the amount of memory currently

[laffer1 at midnightbsd.org]

Log Message:
-----------
Fix stats printing of the amount of memory currently consumed by huge
allocations. [1]

Fix calculation of the number of arenas when 'n' is specified via
MALLOC_OPTIONS.

Clean up various style inconsistencies.

Obtained from:	[1] NetBSD, FreeBSD

Modified Files:
--------------
    src/lib/libc/stdlib:
        malloc.c (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/lib/libc/stdlib/malloc.c?r1=1.3&r2=1.4)