[MacPorts] #28163: mlt: update to 0.6.2

[MacPorts]

#28163: mlt: update to 0.6.2
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 Reporter:  ryandesign@…             |       Owner:  dan@…          
     Type:  update                   |      Status:  new            
 Priority:  Normal                   |   Milestone:                 
Component:  ports                    |     Version:  1.9.2          
 Keywords:                           |        Port:  mlt            
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Comment(by ryandesign@…):

 All ports that depend on mlt would then need their revisions increased as
 well.

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Ticket URL: <https://trac.macports.org/ticket/28163#comment:5>
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