[wp-trac] [WordPress Trac] #9541: allow .m4v in file type checks

[WordPress Trac]

#9541: allow .m4v in file type checks
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 Reporter:  hailin        |       Owner:  anonymous 
     Type:  defect (bug)  |      Status:  new       
 Priority:  normal        |   Milestone:  Unassigned
Component:  General       |     Version:            
 Severity:  normal        |    Keywords:            
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 iTunes video has .m4v extension, and we should allow this file type.
 Otherwise, user can not upload .m4v to WordPress blog.

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Ticket URL: <http://core.trac.wordpress.org/ticket/9541>
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