[MacPorts] #49324: ghostscript @9.16_1: update to 9.18

[MacPorts]

#49324: ghostscript @9.16_1: update to 9.18
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  Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
      Type:  update          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.4
Resolution:                  |   Keywords:  haspatch
      Port:  ghostscript     |
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Comment (by mschamschula@…):

 The packages directly dependent on ghostscript are:
 {{{
 ImageMagick
 LaTeXiT
 asymptote
 dvipng
 epstool
 gimp2
 gl2ps
 groff
 gv
 littleutils
 octave
 ps2eps
 pstoedit
 pyxplot
 texlive-bin
 }}}

 I currently have all of these packages installed on my machine. Of those,
 only ImageMagick and gimp2 caused link errors, and were (successfully)
 rebuilt.

 Needless to say, the number of packages recursively dependent of
 ghostscript is much larger, and I don't have all of these packages
 present.

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Ticket URL: <https://trac.macports.org/ticket/49324#comment:5>
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