[MacPorts] #32766: Update mg to 20110905

[MacPorts]

#32766: Update mg to 20110905
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 Reporter:  macports.org@…             |       Owner:  macports-tickets@…                   
     Type:  update                     |      Status:  new                                  
 Priority:  Normal                     |   Milestone:                                       
Component:  ports                      |     Version:  2.0.3                                
 Keywords:                             |        Port:  mg                                   
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 http://homepage.boetes.org/software/mg/mg-20110905.tar.gz

 Almost builds out of the box on 10.6: `Makefile.in` includes the `-Wno-
 error=unused-but-set-variable` compiler flag, which only works in GCC 4.6

 Once this flag is removed, `./configure; make` builds a working binary
 with no issue I can see.

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Ticket URL: <https://trac.macports.org/ticket/32766>
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