[MacPorts] #50717: py27-matplotlib @1.5.1_1: fails to import when locale is set to just `UTF-8`

[MacPorts]

#50717: py27-matplotlib @1.5.1_1: fails to import when locale is set to just
`UTF-8`
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  Reporter:  petr@…         |      Owner:  sean@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  haspatch
      Port:  py-matplotlib  |
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Comment (by petr@…):

 @mojca @sean: I already applied this because it caused issues for quite
 some people. Hope that is okay.

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Ticket URL: <https://trac.macports.org/ticket/50717#comment:9>
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