[Midnightbsd-cvs] mports: Makefile: bump version for png

[laffer1 at midnightbsd.org]

Log Message:
-----------
bump version for png

Modified Files:
--------------
    mports/x11-wm/afterstep:
        Makefile (r1.7 -> r1.8)
        (http://cvsweb.midnightbsd.org/mports/x11-wm/afterstep/Makefile?r1=1.7&r2=1.8)