[MacPorts] #33853: port mednafen version upgrade

[MacPorts]

#33853: port mednafen version upgrade
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 Reporter:  and.damore@…             |       Owner:  adamw@…          
     Type:  update                   |      Status:  new              
 Priority:  Normal                   |   Milestone:                   
Component:  ports                    |     Version:  2.0.4            
 Keywords:  haspatch                 |        Port:  mednafen         
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 I'm attaching patch to update mednafen to 0.8.D.3 .

 Version has hex digit so epoch is set. The existing patchfile seems
 unneeded, patched pointer casts for zlib and GL, those give errors with
 clang.

 Please state if you need strict maintenance of the port or not, in the
 latter I'll add openmaintainer to maintainers to streamline patches.

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Ticket URL: <https://trac.macports.org/ticket/33853>
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