[MacPorts] #52756: libsdl2 @2.0.5: please default to +x11

[MacPorts]

#52756: libsdl2 @2.0.5: please default to +x11
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  Reporter:  ryandesign   |      Owner:  jmroot
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  wontfix      |   Keywords:
      Port:  libsdl2      |
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Comment (by dbevans):

 I made the change because the libsdl2 default seemed to make more sense
 and this change allows the ffmpeg build to succeed without some manual
 intervention.  But I wasn't comfortable with forcing -x11 if +x11 was
 previously selected.

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Ticket URL: <https://trac.macports.org/ticket/52756#comment:4>
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