[Midnightbsd-cvs] src: mport.updepends.c: Fix segfault when arguments are incorrect.

[laffer1 at midnightbsd.org]

Log Message:
-----------
Fix segfault when arguments are incorrect.

Fix usage

Modified Files:
--------------
    src/libexec/mport.updepends:
        mport.updepends.c (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/libexec/mport.updepends/mport.updepends.c?r1=1.3&r2=1.4)