[MacPorts] #53355: screen: update to 4.5.0 (from January 18th)

[MacPorts]

#53355: screen: update to 4.5.0 (from January 18th)
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  Reporter:  ojkastl  |      Owner:  youvegotmoxie@…
      Type:  update   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  screen   |
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Comment (by ojkastl):

 I'll attach the diff from 'diff -u Portfile.orig Portfile'.

 As I wrote on the mailinglist, I have no idea what the patches do exactly,
 so maybe someone who does should consider dropping them or not.

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Ticket URL: <https://trac.macports.org/ticket/53355#comment:2>
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