[MacPorts] #30781: Small change to qt4-mac and qt4-mac-devel Portfiles

[MacPorts]

#30781: Small change to qt4-mac and qt4-mac-devel Portfiles
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 Reporter:  carsomyr@…          |       Owner:  macports-tickets@…                   
     Type:  defect              |      Status:  new                                  
 Priority:  Normal              |   Milestone:                                       
Component:  ports               |     Version:  2.0.99                               
 Keywords:  haspatch            |        Port:  qt4-mac, qt4-mac-devel               
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 When browsing the Portfiles for qt4-mac and qt4-mac-devel, I found that
 the minor Mac OS X version detection could be improved so that it behaves
 as the author intended.  Please find attached the Portfile patch.

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Ticket URL: <https://trac.macports.org/ticket/30781>
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