[Midnightbsd-cvs] src: util.c: Detect bad exit status properly and return an MPORT style

[laffer1 at midnightbsd.org]

Log Message:
-----------
Detect bad exit status properly and return an MPORT style error.  Most of the calls think this is returning MPORT_OK and it wasn't

Modified Files:
--------------
    src/lib/libmport:
        util.c (r1.31 -> r1.32)
        (http://cvsweb.midnightbsd.org/src/lib/libmport/util.c?r1=1.31&r2=1.32)