[MacPorts] #26476: mlt: update to upstream version 0.5.10

[MacPorts]

#26476: mlt: update to upstream version 0.5.10
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 Reporter:  dan@…                |       Owner:  ryandesign@…           
     Type:  update               |      Status:  assigned               
 Priority:  Normal               |   Milestone:                         
Component:  ports                |     Version:                         
 Keywords:  haspatch maintainer  |        Port:  mlt                    
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Comment(by ryandesign@…):

 The reason is probably that when mlt was first added in r52065 it was for
 a development version of 0.4.0. As soon as we updated to the final version
 of 0.4.2 in r53221 we probably should have switched to using distfiles as
 usual. I suggest we take this opportunity to do this now. How does the
 attached patch look to you? It builds ok for me.

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Ticket URL: <https://trac.macports.org/ticket/26476#comment:11>
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