[MacPorts] #39033: gtkimageview: fix compiling with -Werror by default

[MacPorts]

#39033: gtkimageview: fix compiling with -Werror by default
---------------------------+----------------------
  Reporter:  ionic@…       |      Owner:  devans@…
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.3
Resolution:  fixed         |   Keywords:  haspatch
      Port:  gtkimageview  |
---------------------------+----------------------
Changes (by khindenburg@…):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 This appears to have been committed some time ago - it builds fine

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Ticket URL: <https://trac.macports.org/ticket/39033#comment:6>
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