[MacPorts] #34066: gmt4 update to 4.5.8

[MacPorts]

#34066: gmt4 update to 4.5.8
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 Reporter:  florian@…          |       Owner:  macports-tickets@…                   
     Type:  defect             |      Status:  new                                  
 Priority:  Normal             |   Milestone:                                       
Component:  ports              |     Version:  2.0.4                                
 Keywords:  haspatch           |        Port:  gmt4, gshhg-gmt-nc4                  
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Comment(by takeshi@…):

 Sorry for slow response. Your changes seem to be OK but I will have to do
 two commits: one for the main changes and the other for white space
 change. BTW where does patch-bugfixes.diff come from? Did you find all the
 bugs? Usually we create a patch for each file but the problem is that
 there are so many files to patch. Are the developers going to adopt these
 patches in the future version (4.5.8.1 or 4.5.9)?

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Ticket URL: <https://trac.macports.org/ticket/34066#comment:2>
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