[MacPorts] #54379: gtk3 build needs gio/gdesktopappinfo.h which is not available

[MacPorts]

#54379: gtk3 build needs gio/gdesktopappinfo.h which is not available
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  Reporter:  peterjw  |      Owner:  dbevans
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.1
Resolution:           |   Keywords:
      Port:  gtk3     |
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Comment (by libsystem-ethan):

 I'm receiving this when building `py27-gobject`. The offending file seems
 to be `pygobject-2.28.6/gio/unix.override` at line 27 (`#include
 <gio/gdesktopappinfo.h>`).

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Ticket URL: <https://trac.macports.org/ticket/54379#comment:5>
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